We have had three Cs and three Bs over the years. We miss our B for its convenience, parking ease, mileage, quality, etc. We had marvelous service out of all three of our Bs and they are simply better built than most Cs.
Anyway you cut it, a B is a van and a C is a truck and both drive like what they are....van or truck.
We love our C we own now because we boondock for extended periods of time. As soon as that phase of thinking we are pioneers is over, we will return to B World and tour the country.
Personally, I cannot imagine being in a true B with a couple of kids. Small Cs can work for that purpose, but boy it is still challenging. Couples can cope well with the reduced size of a B and can have a ball traveling. If you truly think you will be traveling with more than two people in the front two seats, I suspect you will be more happy with a C. That said, we spent as much as two weeks at a time touring and staying in national or state parks, BLM sites, etc in our previous Bs and were not offended by the closeness. But it was only the two of us.
I will never be as happy driving a C as I was driving a B. True Confession.
Paul