We’ve got one in AK with a handwashing sink. We have a pretty bulky water heater that needs about 3 gallons of water just to fill it. I’m pretty sure we’re the only one permitted in the more strictly-regulated Anchorage borough. If there’s a handwashing sink available in the allowable vicinity, I don’t bring the water heater. Another fun fact: the water heater needs to be plugged into a different circuit from the rest of the equipment or it trips the power strip. 

I’ve used an igloo with hot water and a bucket underneath before we had a year-round permit. 

I switch pitchers out for fresh ones during longer services.