Thanks everyone for the input. We put a 10 lb bag of ice in it when we left the campground (it's only 20 miles from home). We will put another 10 lb bag in when we go back in Nov and then empty it.
Here's one other question I have, though:
The back wash adapter that I used, I am thinking about putting it on as part of our setup and not just when we are breaking down.
Does anybody else do this?
My wife and I discussed it and the only 'issue' would be the visible 'debris', but we'd cover the visible plastic with a towel, so as not to irritate or offend other campers.
It just seems inefficient to do it as a 'step' in the breakdown process.
Thoughts?