Caveat: you cannot see the lake from the camping spots
Camped site 26
Wooded county campground. Many of the spots at the West campground are paved. They all have electric. A few have other amenities. Water and dump site in the park (dump at east campground), but not at most spots. Spots vary in length and width. Decent playground. They had some bags and horseshoe courts near the entrance.
It is a COE campground. We stayed in site A25. Not all loops are paved. A is not. But the site was pretty level, wasn't too much trouble to get our trailer backed in and leveled. No water hook ups, so fill up after you get in the campground before you park. Lots of prairie area around, spacious sites. Varying levels of shade. A25, had a good amount of shade and was near the nice playground and nice bathrooms. No view of the lake from loop A. Nearby bike paths. A few minutes to restaurants.
Some full hook ups, sites not very level, playground ok. Can hear shots from gun range next door. Dog park, pool, arcade. We have camped here a couple times, and stored our rig here for a while. Didn't find there was that much going on here to keep us busy. Not a lot of nature, no trails or biking accessible from campground.
Spots kind of level, lots of choices of pull thru or buddy sites. Decent playground, water pillow for bouncing, fishing pond, dog park, swimming pool. Well maintained, lots of planned activities. KOA, so not a lot of nature. But no traffic or train noise. Full hook ups, including TV.
Like most Iowa state parks, no sewer or water hook ups at site. Not super level. Near red rock, but cannot see the lake from the campground, cannot access the bike trail directly from campground. Wooded area, no trails or anything special in the park. Showers flooded the bathroom and had to push the button every 30 seconds to keep the water going.
Around this area there are many Marion county campgrounds that have better sites and amenities.
This park is a CCC built park. Lots of twists and turns for an RV to get to their spot. We have a longer TT, and it was tight and nerve wracking to navigate. We had reserved a spot that was supposed to be long enough for our trailer, but was not. They were luckily not full but the spot we found was on a slope and uneven. I thought about driving 4 hours back home rather than continue to try to get the RV level. Someone across the way took pitty and helped us. I think the best RV spots are up the hill by the bath house.
On Lake Okoboji but heavily wooded no view, acorns dropped on our roof every 10 minutes, I was afraid it would bust the skylight. Marshy area by the tent sites tons of mosquitoes. If you can get a spit at Emerson down the road, do that. Bath house and playground ok. No one answered the phone, no one at the ranger station. Rode our bikes down the road to get the bike trail.
We couldn't find many spots for the busy holiday but this park had a few. Very helpful host. Fun splashing in the river catching minnows by hand. Pretty park. Easy turns with the trailer. The RV spots were a mixed bag. Some shady (higher numbers), some full sun. Playground was skimpy. If you are over 12 ft, make sure and take the detour around the tunnel.
There are water hook ups, I just had to use 75 feet of hose to get to it. And the electric I had to use a 30 ft extension cord. Funny, I didn't have either and had to drive 24 miles to Walmart on a holiday to get them. I do think site 30 was probably the worst from what I saw. Wish that when I called to ask about the sites the county office would have mentioned some sites the hook ups are super far away. The sites have a little concrete pad which makes it easier to level.
Honey Creek resort run by the state of Iowa (not to be confused with Honey Creek State Park nearby) is not your typical camping spot. There is a resort hotel with an indoor waterpark, cabins for rent, and an RV Park. The hotel and the RV park are right on the lake. Rathbun is maybe the nicest lake in Iowa (I would say Okoboji, however that has become an overcrowded mess).
The RV sites: There are not many of them, 20 I think. But they are all paved, level, full hook ups, spacious, with a view of the lake. I don't even think we exchanged harsh words setting up it was so easy. ;) There are even a couple sites on the side that have equipment for fall hunters. Trees around the RV area, but not in. Fire ring and picnic table. The boat ramp is at one end of the RV area, so people may drive through with boats. Playground a short walk away on a path, but not right in the RV area.
Indoor waterpark: Probably geared to the 4-10 crowd. Only one bigger slide, lazy river, hot tub, pool with some balance platforms and a rope and a basketball hoop. Then a small kiddie pool with a pirate ship structure with some small slides and some fountains. Not a ton to do, however when we were there it rained for an entire day so that was very handy. Snackbar that serves booze.
Lake: one of the biggest in the state, not too busy as it is 2 hours from Des Moines so not a lot of day traffic (unlike Saylorville and Red Rock). Boat rentals available.
Resort hotel: I haven't been in the guest rooms. There is a lobby, restaurant/bar. I have not eaten at the restaurant. There is a little shop with necessities and firewood. There is a nature program where you can check out backpacks for kids to explore nature. Grounds are nice and lush, paths for walking and biking. There's a golf course.