We have a 2016 377RLBH - wintered last year just outside of Washington, DC. Had abslotely no issues with the camper and the vented underbelly heat but we did have a few weeks of cold, windy conditions.
We wanted to skirt it this year but didn't want to spend 2-3k on a custom skirt. Found some great DIY info online and gave it a try with very good results.
Purchased billboard tarp for about $90,
a grommet tool with grommets (
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1)
and some 2x2 adhesvie hooks. (
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1)
Took about a day to cut the tarp and hang everything. I purchased some landscape lumber to use underneath to hold the tarp tight.
We can definately feel the difference after a few windy days
The entire install was less than $200.00