Camper Van Conversion

We took a trip to the lakes for easter with a few of our friends, the idea was todo a lot of walking.  I think we did quite a lot of walking, including climbing a mountain, and a good time was had by all.  When we first got to the campsite it had been raining for a few days (not surprising for the lake district), so the site was rather boggy.  We had also been unable to get a pitch with electric, so I got a chance to see how long the batteries last, the answer is 3 days with switching the fridge on to battery over night. Some of the nights where rather cold, some of our friends who where sleeping in tents got very cold.  We where not exactly warm either, firstly we should brought the duvet as well as the sleeping bag (my other half kept telling me I told you so), but also there are quite a few drats that kept letting all the heat out the van. When the van's batteries stated the go flat and the heater would not startup, then it got really cold.

 The vans doors (back doors, and side door) are only really designed to keep people and the rain out, so when they close there is a bit of an air gap.  Initially I thought it was quite a small gap and would not make much difference, I was wrong.  You could realy feel the cold air rushing in though this smalll gap reducing the heat in the van quite a bit.  I am going to have to come up with a plan to block/fill or otherwise deal with this gap as it's getting really cold at night.