I've almost got this towing thing down. One more ?

To answer the above question...
We plan on trips within 5 hours ~ 95% of the time. The occasional longer trips will be broken into 5 hr increments (at most) due to the fact that we're teachers and have plenty of time to travel in the summer. I'm not sure we'd ever need more than a tad bit of water, nor am I concerned about full tanks of propane.