Insulating and heat taping a Passport 2650BH

[Fulltime5]

Hi yall,

We leave for Arizona from Maryland in 5 days with hopes to make it to my hometown in Pine AZ by Thanksgiving.

We just bought a Keystone Passport 2650BH with the stock underbelly covered with that corrogated plastic. My question is what MODS can I do to increase our chances that we wont have any freeze damage to the rig on our trip and stay. We intend to keep a southerly to mid route that SHOULD keep us from experiencing any freezing temps but as a precaution I'd like to go a little above and beyond in case there's any freakishly cold weather along the way.

Will I find any plumbing that is not inside the coach? Should I wrap all my internal plumbing with foam tubing?

Any heat pad/tape kits you all could recommend? Where do I put them, etc.

If I can avoid crawling under my coach and dropping the corrugated plastic to install anything would be great but I will if you all think I need to.

Thank you in advance!
J