Thank you Mark and Dave. We've decided on a Class C in the end. There are only 4 of us and I figured enough people have rented them so it shouldn't be a problem. It will be part of the experience! We are going to SF afterwards - although I would have loved to take the RV to Yosemite and then to SF, I think that might be too much for the family.

Thank you again for your valuable advice.

John