I used to own a 1975 VW camper bus, man was it fun! But again it was an old vehicle and did not drive it in cold snowy weather. I've been thinking of getting something more modern like the 1995+ VW eurovan camper conversions. These look great but are quite expensive for late model versions.
[The Samba classifieds][1]
Fleetwood makes a few neat looking popup campers such as the scorpion, evolution and element series. The element series Neon is so small and lightweight it can be easily towed with a small car.
[Fleetwood trailers][2]
[1]: http://www.thesamba.com/vw/classifieds/search.php?submit=yes&keywords=&type=text&stype=all&username=&yearfrom=&yearto=&pricefrom=&priceto=&model%5B%5D=§ion%5B%5D=55&wanted=show&zip=&zipdist=0&state%5B%5D=&usaregion=&country=&sort=date&sort_order=DESC&submitButton=Search
[2]: http://www.americancampersandtrailers.com/fleetwood_folding_trailers.htm