We decided to make this RV park our maiden voyage in our new Travel Trailer. It was pretty pricey for an RV park at the time we booked (+80/night) but then again there isn't much competition that is actually up on the mountain. It's actually a pretty large park, but doesn't feel like it until you get out and explore a bit as the loops are pretty well disconnected. The sites are typically close together, but some have more separation than others. Most sites are pull through. Full hookups worked well for us. There was a group of tent campers across from us, so it seems they do allow tents in RV spots as well. The Lodge has wifi, the rest of the park does not. The Lodge area has a small store with plenty of RV parts and snacks if you happened to forget something. If you need actual supplies, head up the road a bit to the local Thriftway, a local grocery store.

The main attraction of this place is the nearby recreation. There is a path that leads to the Wildwood recreation area and within the RV park itself there is access to the Salmon River for fishing/swimming. There is easy bike riding in the RV park, and right across Hwy 26 is some of the best Mountain Biking in the country at the Sandy Ridge Trail System. Using this RV park as a jumping off point, there are endless hiking trails and lakes to paddle and explore in the Mt Hood wilderness. You will never get bored in the Mt Hood area.

Some great places to eat in the area are Koya Kitchen, that serves sushi and ramen with plenty of outdoor seating and a full bar. Also nearby and not to miss is the Skyway Bar and Grill with amazing BBQ, full bar and live music on the weekends. Of course there's always Timberline Lodge if you're looking for a bit fancier, you definitely can't go wrong there with the food or the views, or year round skiing/snowboarding.

All in all the Mt Hood RV park is in a good location, which is what you're really paying for, but not somewhere we'd stay longer term due to the cost, noise and size of the place.

My family and I have stayed at this campground a few times, not because there's really anything special about the campground itself, but because of it's proximity to Tamawanas falls. The campground is primitive with a couple vault toilets, trash cans and sites with no amenities besides a fire ring and table. 

If the campground isn't too crowded and you get to choose, pick a spot right on the East Fork Hood River. The river noise will drown out most of highway noise, plus it's nice to have somewhere to dip your feet, or body, after the hike to and from Tamawanas falls. The falls trailhead can be reached via the campground and the hike is moderate and well worth the work in my opinion.

Also nearby is the hike to Lookout Mtn, which we really liked. It was a bit more of a strenuous hike with lots of elevation gains, but the views at the top were well worth it. You won't be able to see Mt Hood and surrounding lakes like that from anywhere else.

If you're looking for a quick weekend spot to stay for a couple nights (max), that is close to some good hiking, but close to a main road, this place might be worth checking out.

If you enjoy getting away from the crowds and camping more primitively, this place is for you. Facilities at the campground include vault toilets and trash cans, but no running water, so bring your own. There is a boat dock and a few sites even have direct lake access. Some of the best rainbow trout fishing can be had here, there are some big ones lurking deep. Unfortunately since this is a reservoir, swimming isn't allowed, but human powered boats (canoe, kayak, SUP) are allowed.

If hiking is your thing, not only is there a relatively easy trail, i.e. good for families, that goes around the entire outline of the lake, but the PCT (Pacific Crest Trail) is nearby, with some great views and small lakes (that you can swim in) along the way. Oddly in camp the mosquitos weren't bad, but on this section of the PCT I got eaten alive, so bring plenty of protection during mosquito season.

Before you get to the campground you'll see the the Olallie Lake "resort" with some primitive cabins and a yurt to rent. The resort has a small store (be sure to support them with a purchase) with pedal boats, rowboats and canoes that can be rented here.

There's plenty to do at Olallie Lake, so bring your fishing pole, your swim suit and your hiking boots and enjoy the amazing secluded views of Mt Jefferson and Ollalie Butte, and the solitude.