If you live in an area that has snow and cold weather in the winter months, then this may be more important to you.  Obviously, the best would be a garage, carport or some other type of structure to put your vintage camper in or under to keep the elements off.  Below is one type of 'garage' offered by  SHELTERLOGIC.  Click to goto their web site and sure there are others you can find by searching the web.

• Snow accumulating on the roof and left there will add extra weight and may cause structural damage.
• It may also cause the edge and roof seams to separate and cause water leaks when the snow melts.
• Snow accumulating around the bottom can be bad as most walls are made of plywood or some wood.  The wood could draw the moisture up into the walls and cause rot to the plywood much like a candle draws the oil into the wick to burn.
• For those that have a water tank, lines, bath, etc. you will need to make sure all the water is flushed and drained from all of them.  Some people will use an RV antifreeze to fill these lines, etc. to prevent them from freezing.
• If you have a garage or other storage area to put your vintage camper in during the winter months, this would be the best.
• You can keep the front of the camper raised higher so the snow can slide off easier if it warms a little instead of accumulating.  It it does start to accumulate on the roof or around the bottom then you can remove it. 
• You can use a long handled push broom to get it off the roof by carefully raking it off.
• Another idea if you have a small heater you could let it warm the inside and the heat should help loosen the frozen snow.

You can use a tarp to cover the camper.  I'd make sure any snow that is accumulated is removed or you can make a framework to keep the tarp and that snow weight off the camper. Below is Jeannie's lattice work and blue tarp for Scotty.

Jeannie found these car covers for a very reasonable price.($29)  They are large enough for the Scotty for winter cover.

These are just some of the ideas for winterizing your vintage camper, especially if it has to sit out in the elements.  I'm sure there are other ideas too.  EMAIL ME any ideas and/or pictures and I will add them to the page.