14 people in an RV is going to be fricking crowd. We own a 42 foot class C and four in it is a fricking crowd. 14 would be akin to a can of sardines except sardines are dead and cant bitch and moan. It will for certain be a unique experience. I would also suggest that 14 Americans would surpass the load capacity of the chasis even in a class A diesel pusher. The camper itself is usually pusing the load capacity...add water and food and drinks and 4-5 people and most motor homes exceed there rated capacities. It isn't much of an issue but adding another 1500 pounds with 10 extra people and it could be...especially with them all jockeying for one of the 5 seats available in the thing.

On a practical note the thing will guzzle fuel....about 5 MPG if it is gas and you baby it and probably 9 if its diesel and you baby it. Having 14 people on board ain't babying it so it will be worse most likely. It will also have inadequate cooling for that many people. It will be pretty warm in the camper anyway...even the best built ones are not insulated very well and the most it can have is 2 ACs unless you're talking about a VERY expensive class A and even then with 14 bodies at 98.6 degrees and the related humidity from that many people even the best RV AC system would be taxed even when plugged into good shore power....running on the onboard generator will make it worse.

And this is one piece of advice that no one would know without experiencing it...unless it has a top of the line air ride suspension, unheard of in my experience with class c motorhomes and even very nice class a's do not have top of the line air ride suspensions, no one is going to be able to ride behind the rear wheels unless they break horses for a living and enjoy it...I have seen my daughter hovering 3 feet in the air on the back bed in our motorhome on every bridge approach.