I've been to Odell twice but always seem to pick a weekend with weather that makes you want to stay in your sleeping bag!
The campsites at Odell are a little on the smaller side and may not have the trees your looking for to hang a hammock. Not that you should if you're camping any time earlier than July!
The southeast side of Odell can be subject to cold winds coming off the lake, so be sure to keep that rain fly up on your tent and a fleece handy. If you're feeling a little too chilly, the resort keeps a fire burning in the den.
There are plenty of snowshoe trails around Odell as well as some hiking trails in the Diamond Peak wilderness that also connect to the PCT. The trail we took did give us a bit of elevation gain and later some nice views of the smaller peaks in the area.
If you're planning to camp here, bring warm clothing and rain gear! It may be a bit chilly, but the nice hikes in the area make it all the more worth it to get up and get moving.
My wife's family has been camping here for more than a decade and I was only recently looped into the tradition of spending a week fishing, reading by the lake, telling stories over beer and the occasional hike.
Poole Creek gives you boat access and sits you on a nice trail around Lemolo lake. You're also a short drive away from Crater Lake and Mt. Thielsen. The trail is a nice day hike around the lake and takes you around other campsites on the lake as well as scars from the Bunker Hill fire.
Fishing on Lemolo will require you to get up early in order to get a good catch. The trout there can be good size but they're elusive creatures. If you leave a deep line in overnight from your campsite, you could get a brown on your line!
The campsites at Poole Creek are generously sized and can fit several tents. I've never had trouble finding good trees to hang a hammock from.
The only downside here is the water in Lemolo lake. It usually has a fine temperature for swimming, but late summer algae makes a lot of people think twice. If you want crystal clear (although cold!) water head to where the North Umpqua meets the lake on the east side.
My wife and I went camping here with some friends in the summer of 2017. The site we stayed at (number unknown) was clean and there was easy access to a water pump and bathrooms (actual plumbing). The East lake and Paulina lake area have some good trails to hike and ride horses on that are well-used and matched the maps that we downloaded. If you hike them, bring lots of water since it's a dry area and there are not a lot of streams to refill and filter water from. Also bring plenty of sunscreen since the forest canopy is not very thick.
The lake is wonderful! The water was crystal clear and a comfortable temperature for a post-hike swim. Be sure to wear sandals on the beach since it is made up of coarse volcanic rock. You can walk barefoot, but you sure as heck won't be recreating any Top Gun volleyball scenes. If you're using inflatable furniture on the beach, I recommend putting down a tarp to protect from any sharp edges.