gerrym51 wrote:
width and height are bigger factors than strictly length.
Roadtrek makes XL versions of 24 feet.
Have you looked Navions. similiar size
From personal experience with both a B and a B+, height is a non-issue. You can't park a Class B in a parking garage. Width is no problem driving but parallel street parking is not practical, it is usually a problem with a wide Class B as well. In surface parking lots, length is the most important dimension, 22 feet is about max in many cases, although of course even big Claas A's can park at Walmart.
In our old B, we stayed in hotels in some big cities that had parking garages for the guests but I always called before making a reservation and told them I was driving a "high top van" and they were always able to arrange outdoor parking, although sometimes it was a few blocks away. Good luck with your shopping.