Our baby spider has no problem having only one hide. most of the time he prefers to wedge himself in between the hide and a side of the tub. He has no problem laying ont he cool side by his water. I should add that the sides and back of his tub are covered.

I think, so long as they use both sides and look comfortable, it should be quite alright. So - I second the notion!

I have a sideways rack..for the rest of my snakes. I love it. Makes it easy to have both a hide and a water bowl on the warm side, and still have room for them to lay outside the hid, on the warm side. They all love it.

Hopefully that helps!
Pita