It just seems like another big, bulky thing to pack. I'm sure the options folks have posted above work... but you'd need to pick a good day, or evening, without any "dubbya" so you don't end up with crunchy, gritty pizza. Then, when you're done you'd need a good place to store it for the rest of the trip where it won't get loaded up with sand. Sure, it seems less important when you're not using it, but I've found when you bring specialty cooking equipment to Glamis the first time it gets loaded up with sand it's never the same and will always produce gritty food. If you're an RV + trailer/stacker person, perhaps not so much of an issue since you could throw it in a big action packer or other plastic tote and keep it inside the enclosed/stacker. For toy hauler folks, not so easy.
-TJ