Personally I think the "best" way to keep a Pacman Frog is in a 10g tank with an under tank heater stickied on the side of the tank, 2-3" of cocofiber, a water dish, and a screen lid (depending on how much trouble is had keeping up the humidity).

I realize that not everyone can afford a larger setup, but Malcolm moves around alot when he is hungry, and I find it easier to keep the temps down with a screen lid rather than a plastic one with holes drilled. Just my opinion on the matter.