All good advice - my 2 cents.
1-Flow will be quite low but is dam controlled and typically comes up rapidly for power generation late in the day - don't be caught unaware.
2-Some delightful camps immediately below Little Hole - if I remember, you pull into Little Hole and put your name on the first-come list.
3-Only use Melanie at RRT - she and her husband are terrific. "Self-guided, full support river running and white water rafting adventures: safe shuttle services, full or partial support river trips available, and complete, delicious meals are prepared. Whitewater river trips include: Gate of Lodore, Lower Yampa
4-There won't be any bugs in Aug.
5-You'll be hot.
6-Right after you turn off of 44 onto 191, look for Greendale (left) no reservation - it's walking distance to Flaming Gorge Lodge/Store/Cafe. Firefighters Memorial is the next camp (right) reservable, followed by Deer Run (showers) and Cedar Springs (both left) both reservable.
7-On Lodore, avoid Compromise and Big Island.
--You cannot rig on the ramp below the dam - there's a nice big lot uphill (look on Google Maps - earth view). They're pretty testy about getting off the ramp proper - you can pull your boats to the side-below. Heavy pressure from guides in drift-boats with fishing clients to launch early - I'd recommend avoiding them. I usually get the boats in the water and then drive back up to the parking lot for a load of gear to reduce ramp time - the trail from lot to ramp is VERY steep.
--Bathrooms at the dam put-in, Little Hole, Indian Crossing (Jarvie Ranch), Lodore Ranger Station, Echo Park, and Island Park.
--Pull out at Split Mountain - otherwise you'll have a long row/roast ahead of you with nothing to show for it but boredom.
--Let me know if you want my spreadsheet with notes on rapids, distances, and run suggestions. Have a great trip. Darryl