Two hides would be fine, as well as any size of water dish. They can do fine on newspaper, but I think they prefer aspen shavings, as they do like to burrow. A 10 gallon tank should be fine for the first couple of years, but you will ultimately need a 20 gallon long size for an adult. Make sure you get something with a very secure lid. Dogs can actually be helpful if your corn snake escapes. Ours has been. She will bark and alert us when she locates an escaped corn and has never tried to harm one.... so far. Cats will just kill them silently, though.