what size tub are u currently using with the VE2? i think that's a modular rack system that allows u to use different size tubs if u wanted? what substrate are u using and plan to use? how do u feed them?
unless your husbandry is god awful, i don't think they will stress easily if left alone. but in a large tub, it might be hard for u to feed or for them to find prey. my colubrids including my Hondo are not waiting at the front of the enclosure like some of my BP's on feed day. but if u keep bugging them to find and feed them, i think that can be stressful.