if the temp gets down to 28 for any time it may freeze your water line so go down to store and by some pipe insulation and first wrap tinfoil around your water hose then the pipe insulation and use drc tape of something to hold it on the hose. remember winter time is hard on TT's and they freeze up easily. My brother had to move out of his house because the pipes in the main house burst and we had his TT winterized so nothing would freeze, by winterized I mean the hose was wrapped not the TT had anti freeze in the lines. we also put bales of straw around the bottom to keep the floor warmer.
they did OK with how we set it up for him.