I've just put them back outside for a bit and they're splashing around in their mini-pond (litter tray full of water, lol). In the meantime the sack has been rinsed off and is on the lawn drying. It was very mucky so I think I'll have to wash it every day if possible. The water bowl gets several cleans and fills each day too. They'll get one more feed before they come in and any food left over from the evening will go in with them for overnight. In a couple of weeks we'll transition them to sleeping in their box on the deck instead of in the laundry; it's getting a bit cramped in there.
Here's the cage just after I finished making it
The other night the boys got to use sparklers for the first time, I think they enjoyed themselves! They've been asking for more ever since.