I appreciate the encouragement to stay. I will.
Turns out that hosts of this forum may be the ones hosting the Jayco forum. If noting else, they use the same software.
I appreciate the counsel on the Jayco...WILL DEFINITELY keep a close eye on the slide and frame.
Observations:
1. It has something like an "arctic package", rated to Zero F. But guess what? The black and grey dump valves are at the ends of the pipes and the effluent in the pipes is exposed to the elements.
My hunch on how to handle this is to carry some RV antifreeze for cold weather and dump about 1/2 gallon into the black tank and grey tank while they are "dry." This should put the antifreeze in the exposed pipes and up against the dump valves.
Since I boondock, I can't add heaters of any type, because the batteries won't survive that abuse.
If anyone has a better solution to this issue, please let me know.
The fresh tank dump valve is at the end of a plastic hose...nice and handy, but also hanging outside the sealed underbelly. I'll probably remove the hose and move the valve to the tank...and crawl under the rig to dump the fresh. Perhaps put a foam cover over the dump valve, too...kind of like what's used on a hose bib at home.
2. Several have told me that Jayco is no better than the rest when it comes to supporting the fresh tank. Since I travel wet always, I'll have to drop the underbelly and fabricate some extra support. No big surprise, but I was hoping that Jayco did a better job on this.
Anyway, thanks again to everyone, and I'll "see you around."