Just to add.. a moist hide is a good way to keep the leo hydrated aswell, regardless of their water bowls mine drink from the condensation on the top of the hide. It's best to have 3 hides when it comes down to it, and if there is not enough room then best to upgrade to a larger enclosure or bin. A 10 gallon tank won't comfortably house an adult leopard gecko with the amount of floor space it allows (I don't know the age of your gecko but they all eventually grow) until you upgrade I'd say continue to offer a moist hide if you have to choose. My leos are in racks in large bins that allow for 3 hides, food & water bowls + space to move. Everyone does it differently in this hobby but when I'm keeping living things I make sure they have everything they need!