For a 16 day summer trip the best way to maximize your time above and below Diamond to limit the disadvantages of both are to run 16 full days to Diamond Creek passing DC in the afternoon on Day 16. Camp from Truckstop 226.5m to 229 Travertine Falls. Day 17 run all the rapids, shade up at Bridge Canyon then run the last rapid at 4-5 pm then tie the boats together and nightfloat with a takeout on Day 18. In this way you can run all the rapids, save $1280 on Hualapai fees, use the maximum allowable time in the Canyon, miss the helicopters AND takeout at 7am in the morning when it is cool in the otherwise 120 degree heat")
I would not run 240-280m in the summer day personally because of flatwater and helicopters. Nightfloat is too easy and beautiful.
Alot of people think you need more days to takeout at Pearce Ferry? Generally speaking people that takeout at DC show up at 220m on Day 15. Instead of stopping at 220m on Day 15 push on through DC between noon and 2pm and then run all of the rapids. Tie the boats together and nightfloat to Pearce Ferry missing all the Helicopters at 260m. We plan an easy Spaghetti night for dinner so we can cook on the boats. Nightfloat times from 240m are High water(18Kcfs 12 hours), (8k cfs 14 hours) The truth is you will be back in Flagstaff before the DC folks and you will be able to derig in the cool morning. 7am takeout time is my preference. 2 hours from Vegas. 4 hours to Flagstaff.
Just recently some folks got word the DC road flashed 10K a day before takeout. They were at 195mile! The next day they ran 195m-147m and pushed off their nightfloat after dinner at 9pm, arriving at Pearce early morning") 85m day in 24 hours!! and Loved it. Buena Vista Breeders, Hardy Stock
Nightfloat temperatures are usually 20-30 less on the water than at camp. 230m-200m can be straight up hot at night!
Folks nervous of the unknown, social anxiety disorders, personality disorders, bad backs and wierd frames, crotchety, wobbly, light sleepers, and people that need a football field from the next person to pee tend to have tougher times on the nightfloat.