Mosquitoes were notorious.
I'm have just healed, along with the nice, hey stupid, 15 spf at 4 am won't cover you all day with the rays at 12K.
Last year I was there at mid may.
With the snow worse than then, it was prominent but half of the switchbacks were bare going down from Glen Pass to Dollar Lake. Last year it was a but slide all the way down.
At that elevation flat, you would definitely have some snow, but it's going quick.
I've done the Loop 2 other times in 2 days.
Once with my brother and he lost both of his big toe toenails and still curses me for it to this vary day.
The hard part is the 2 to 3 hours of sleep I can only get due to having to get back at dark and to get it done on a weekend off.
The distance isn't all that bad. I did it in 17:45 (I think) last year with out running any of it.