I’ve been buying crawlers in bulk for several years now. My biggest issue with keeping them alive is temp control. I’ve kept them in my basement, garage and garage fridge. I’ve never had a great garage fridge the I think the temp varies too much. It is either too cold and I freeze them, or not cold enough and they go bad. I’ve always used the styrofoam worm coolers with bedding. Last summer I was freezing half gallon milk cartons filled with water and changing them every 2 days. This worked well until you forget to change them after 2 days and it is really warm. I’ve bought food for them but not sure it is necessary. Early in the summer, I go through alot of crawlers.