I have full-timed in my fifth wheel through three winters in Montana and Wyoming, and I am here to tell you that “four season package” is one of the most abused phrases in RV marketing. Some manufacturers mean serious cold weather construction; others mean a foil sticker. Here is how to read the spec sheet and what gear actually keeps you warm.
Quick Comparison
| Product | Best For | Type | Notes |
|---|---|---|---|
| Mr. Heater Big Buddy | Backup heat | Propane | 18000 BTU |
| Camco RV Skirting | Underbelly | Vinyl | Adjustable |
| Reflectix Insulation | Window insulation | Foil bubble | Custom cut |
| Camco Heated Water Hose | Freeze prevention | Heated | 25 ft |
| EcoFlow Smart Generator | Power backup | Inverter | Quiet |
1. Mr. Heater Big Buddy - Best Backup Heat Source
I run mine when temps drop below 10 degrees and my propane furnace cannot keep up. Catalytic safe shut off if oxygen drops. Check price on Amazon.
2. Camco RV Skirting - Best Underbelly Solution
Skirting traps heat under the rig and keeps tanks from freezing. This is the single biggest upgrade for winter RVing. Check price on Amazon.
3. Reflectix Insulation Roll - Best Window Insulation
Cut to fit each window and pop in at night. R value is modest but the radiant barrier cuts heat loss noticeably on single-pane RV windows. Check price on Amazon.
4. Camco Heated Water Hose - Best Freeze Prevention
Self-regulating, rated to negative 40 degrees. Pairs with heat tape on your spigot. Saved me three times last winter. Check price on Amazon.
5. EcoFlow Smart Generator - Best Power Backup
Auto starts when battery hits a set percentage, keeps the furnace running through cold nights without shore power. Check price on Amazon.
What Matters Most
Real four season construction includes: enclosed and heated underbelly, tank heating pads on fresh, gray and black, double pane windows, R value of at least 30 in walls, dual furnace return air, and a heated and insulated wet bay.
My Setup
Heated underbelly, tank heaters, double pane windows, custom canvas skirting, heated water hose, Mr. Buddy backup, Reflectix on all bedroom windows, and an EcoFlow tied to my battery bank.
Common Mistakes
Trusting marketing without checking specs, ignoring the wet bay (where pipes freeze first), skipping skirting, leaving tank valves open in winter, and underestimating propane consumption (you will use a 30 lb tank every five days at zero degrees).
Final Recommendation
A real four season package is worth the upcharge if you plan to camp below 32 degrees. Pair it with Camco skirting and a Mr. Heater Big Buddy and you can confidently camp into single digit temperatures.
Frequently asked questions
Can you really use a four season RV in below zero weather?+
Yes, but only with the right setup. Tank heaters, heated underbelly, skirting around the rig and a backup heat source like a Mr. Buddy are all part of safe sub-zero RVing.
Is the four season package worth the extra cost?+
If you camp in shoulder seasons or want freedom to chase weather, yes. If you only camp May to September, save the money and put it toward a better mattress and solar instead.