The wife and i have been looking for a four season toy hauler trailer. We'd like to stay in the 18'-21' range and need it to be four season. It seems to be a hard thing to find, something as simple as better insulation, windows and heated holding tanks. We've discovered that most of the Desert Fox ones are four season, but not too many of them for sale used. Anyone have more information or know of other brands that fit the bill? I've found the end of the internet with Google and am either using wrong search terms or chasing the impossible. Thanks!