If we are out in what might be freezing weather, I carry two clamp on work lights that I put inside the bis with the water tank and waste tanks. I also have a remote thermometer in the bin so I can monitor the temps inside without haveing to open the bin door. I usuall have 60 watt bulbs in the lamps, which has been fine so far, but 75 watt bulbs work even better. With outside temps in the low 20s, bin temps usually stay in the 40s or 50s. Works for us. Outside shower tubing is actually inside the wall, but I usually drain it anyway. If winterized, I always have pink stuff in the outside shower, so that usually in in it all year long. We started out with a 1999 Hurricane, but after putting 50K miles on it we traded up a bit.
Noel and Betty Johnson (and Harry)2005 GulfStream Ultra Supreme, 1 Old grouch, 1 wonderful wife, and two silly poodles.