There is a camp site about 1/2 mile down from Rock Creek that is very popular. I personally prefer the Log Cabin site right before Rock Creek. Then the 3rd morning we stop at Rock Creek to fill the sun showers at the creek and it's good to go for the shower.
A couple of things I just remembered that weren't mentioned.
1. Get an indian permit, it's worth it if it's a busy day. If you camp on the left side of the river, you have to have an Indian Permit. Here is url: Desolation Canyone Camping Permit Form
just order it and print the check out page to show the Ranger.
2. Be on top of your gear! Make sure to go through all the gear on the permit list. Rangers are getting very strict down there and I have been given an anal exam twice now. Make sure glue is fresh, correct material for your boat in repair kit, extra life jackets, extra oars, all nine yards, check the permit.
3. The mosquitoes come about a week after the river peaks. So you can watch the flow and see how bad it will be. If the river is rising, there will be no bugs practically. I've been down there in the middle of July (most buggiest time) and it really wasn't that bad. Have nets and you are good to go.
Hope all this info helps.