I am not trying to talk you out of Yetti coolers,just giving other options I have used and seen for what you want.
The large Yetti Coolers(120-155 quart) run from like $450 to almost $600 bucks.
Another option if you have the room hunting..A small freezer like a 5 cubic foot or maybe 7,for less than $200 at Walmart and year around use to boot.Coupled with an inexpensive generator that that will run it for under $200 with year around use also, and a temp gauge..
And your set but with year around use instead of just hunting season.
Just a thought and something I do in 90 degree temps hunting.
Jayco