I'm in a slightly different situation....I have a 35 year old son, but I also have a 10 year old daughter and a 7 year old daughter. We spend in excess of 100+ days in our RV each year, so we have a bunkhouse. We had the rear, quad bunkhouse and HATED it. We upgraded to a 5th wheel that has the front bunkhouse with 3 bunks and a couch. It works great for us. The master is in the back and is usually quieter and the bunk room is beside the bathroom for easier access for the kids. (I have to climb 3 steps to potty, but for now, it works). The configuation of this bunkhouse gives the kids some floor space, which was severely lacking in the quad bunk. There was about 16" between the beds, so they either were laying on the beds or in the living room with us.
If you have custody of at least one of the kids and they will be with you all the time, go for the bunkhouse. It only takes one awful weekend to kill the camping fever in the kids.
