I keep mine in my garage. I have 3 plastic storage containers (the deep ones) that I keep them in. One is for small, one for medium, one for large. I cut a large hole in the lid of each one and hot glued wire mesh to the inside to cover the hole and provide sufficient air. The tubs are deep enough that the crickets get plenty of air. My garage gets 90 - 95 degrees and I dont have a problem with them dying except for the number that would normally die anyway. I just make sure they are well hydrated and well fed (sustaining food). I also have a double layer of eggshell carton at the bottom.
Then I have the cricket staging area (death row). These are smaller containers (sm, med, lg) where high nutrition gutload and hydration is available 24/7.
Then they win the lottery and go to "The Island"!!