For August I prefer to do 16 full days to Diamond Creek. 1 day in the rapid section following great shade at bridge canyon 2 pmish, nightfloat and takeout Pearce on the 18th day. However, the old super sweet wave just above sandy point is coming back so I'd definitely plan an all day surf session there if you have the time
You could row home in the moonlight and camp at Sandy Point or a few more miles to South Cove. So I'd make it a 19 or 20 day for South Cove if you have the time and Pearce Scary permitting.
Were you thinking Southcove takeout or Pearce?
Whats the age group, and interests or style of trip? Horseshoes, canyoneering, kayaking, etc.?
As dry and warm as its been this winter its gotta be wet this monsoon? ?. I just pulled off a trip that said they were nightfloating last night(1/31) eating pre-made spinach lasagna and sipping hot totties in their pjs on the dance floor at midnight !