Welcome to the forum
I have a late 90's van and it runs well. It is very reliable and I'd have no hesitation taking on an extended journey. I think used vans offer the best bang for your buck but it sounds to me like the Travato would be ideal. You could even sleep in the front bed and have the bikes fully assembled and upright in the rear.
This post might be of interest:
http://www.classbforum.com/phpBB2/vi...php?f=9&t=2743