We're keeping the cats in a converted large dog carrier. We added a shelf covered in carpet in between the two halves. It's pretty roomy - in fact, they have almost more room than we do! Because we were travelling, we had to use a ball water bottle. At first they couldn't stand the indignity, but now they're still loudly using it. I guess changing the water in the bowl twice a day isn't enough for them.
This is how I woke up several times during the night hearing Kech drinking. Since we've been spending more time in the hotel room, I've seen him doing it a lot during the day, too. I asked my husband (who changes the box) if he'd been peeing a lot and he exclaimed, "someone has!" We had thought he started peeing on the floor just before we moved due to stress. This is how I came to be spending my Sunday morning researching how to test a blood sugar on a cat.