I lived in Steamboat for 12 yrs, that was 25 yrs ago, before my RV days. Its a great place to camp in summer. Its a terrible place to camp in winter. They typically get down to -20 F and occasionally -40. They measure their snow by the foot, its nothing to get 3 ft of new snow overnight.
All the RV Parks close down for winter since they can't keep their water sys from freezing. Its also impossible to remove all the snow that's going to pile up around the RV's, the snow comes so fast, deep, continuous and rarely gets a chance to melt; once you're buried, you're there until the spring melt. Maybe that's all changed since global warming.
The one mountain RV park I've heard stays open all winter is Tiger Run resort near Breckenridge. Its not cheap, and you'll also need to buy some skirting and a couple 100 lb propane bottles.
