Well.... I will not be able to give an update on how cleaning the RoadTrip grill is when using water!
Just received a Weber Q220 form my wife and boys for my birthday!!! One of those, "It was meant to be" moments I guess. Told my wife about a somewhat local hardware store (about an hour away) that had the 220 advertised for $150. on Craigslist, and my wife was working maybe 10-15 minutes from there the next day, so she bought one for me.
We have a camping trip planned for Father's Day W/e, so will have a chance to try the Q out then.