the set up i went for is prob around a 60% land and 40%, same as heather, just gives them that option to do it all. as well as a main land area, i have rocks and bog wood running along the back of the tank, for added fun and texture for the toads, letting them swim under it, climb etc.
my water depth is prob about 3 to 3 1/2 inches and they seem very happy, with this