Dubias are much better climbers than normally mentioned. They are normally too lazy, but will scale straight up the side now and then. with those holes, if the egg crate / tp rolls you have in their come close to those holes you are going to have a lot of babies going for an adventure. I think it would work IF you have one of the 2 foot deep containers, and dont have anything that wants in You dont want to be growing a colony of flies or other pests in addition to your dubias.
Thanks, gonna probably eventually buy some fencing but in nyc right now I don't really want to go home depot or something because their will probably be loads of people their.
Any where I could get online? Small amount for cheap?
Also planning to put petroleum jelly, and put the egg cartons on the left side.