I have a backyard smoker, and I use a tray of water in it as thermal mass to help keep the temperature stable. I don't think the size of the tray is going to matter, but it's roughly 40cm x 30cm x 10cm. Having to keep the tray full of water is a bit of a chore, so I thought about putting a second tray of the same size in. Would this make any difference at all to the speed the water evaporated at? If not, what difference would a single larger tray make, if any?
One important thing to note is that my smoker is temperature controlled (like a normal oven), so it's going to stay at whatever temperature I set it to.