My husband and I just bought an ultralight by keystone and we are not really sure on its abilities to withstand cold weather. We live in Texas but have always gone to Colorado once or twice a year mostly in the summer but some in the winter, but we would like to take our trailer with us this year, we are just not very sure on how to get started getting it and us ready. We are going in either march or april so there will be snow, how do we get the lines and everything ready for this type of weather? Is it wise to us the propane heater the whole time or should we plan to bring a space heater? The under belly is suppose to be factory insulated, but is there anything else that we need to do to it? I would greatly appreciate any input or advice that anyone would have on winter rv'g or just having a new rv period!! Thank you so much! Bep