Agree with mumkin, that a B+ is closer to a Class C than a Class B. (We had one once, so I'm agreeing from personal experience.)
One thing we found with our little MH (motorhome) was that, without a separate vehicle, once we got settled in camp, it was a big hassle to go anywhere if we needed supplies or firewood, or if we wanted to go sightseeing. In some campgrounds, you would need to leave some of your personal belongings (camp chairs, coolers, etc.) in order to mark your site as occupied, or you might return after a day of sightseeing to find someone else had taken your site. Just FYI.