Too big because of pack size? The footprint looks dandy.
If a slightly uncomfortable bed doesn't make you wake up groaning your back/neck/ hips hurt you probably don't need it. I just googled best camp bed for bad backs (I dont have a bad back but I thought theyre the sort of people that would have gone through every option) and a thin inflatable on top of a cot seemed to be the winner.
I'd be too concerned about the drop in temperature or being eaten by bears, tents are safe as houses everyone knows bears can't undo zips or tear nylon