Underbelly Insulation - The Sequel

[muttinthehut]

The other thread had me thinking: is it possible to ADD insulation to the underbelly to fashion your own self-styled "Arctic Package"? I have a 202RBLE and am really curious if this is possible. I don't want to camp in -20F weather, but I do anticipate some possible dips below the freezing mark. So, my questions:

1) Can you add insulation underneath? (I'm thinking some type of rigid foam if it's even possible)

2) Is it even worth the trouble? I mean, if I use pipe wrap for the external water supply and shield the faucets, that should prevent freezing on the outside. Is it worth the trouble to drop the underbelly and add tank warmers? Or is that overkill?

Any advice? Really just looking to avoid any damage for the nights that dip down in the mid-20s for a few hours.

Thanks,
Joe