Perfect for the snakes.
Leos if you can get one of those fountains http://www.petsmart.com/product/inde...ductId=2753957 and have a dish full of mealies they should be fine as well.
Cresties on the other end for that length of time you will need to have someone take care of them, get them a small plastic tub like this http://www.sterilite.com/SelectProdu...=252§ion=1 and have someone take care of them at their own house while you're gone.