We've been out in our B for 6-week trips several times and many times for 3-4 weeks. None of the problems projected by the non-B owner earlier in this thread have come up.
We have put 125K miles on ours and have never considered towing a vehicle. It's too easy to get around in the B to justify the hassle.
The limited space in a B might not be tolerable by everyone, but our B has met our touring needs perfectly. The lack of space is a good trade-off for the increased maneuverability, go anywhere capability, and better fuel mileage. At least for us.