Unless you really need a SRW, consider a drw and larger or heavier TC. Sure, you "can" carry a 9 1/2 hard side on a SRW. I and many others have. However, you'll find a DRW much more stable, and I believe you'll like a longer TC or a TC with slides once you arrive at the camp site.
Another option is to go with. Class B or C. TCs are the most expensive per square feet. I can't think of a lot of good reasons to buy a truck and TC unless you need the truck for some other purpose.
However, we camped in Yellowstone with 6 of us in our double slide TC. It's crowded with everyone inside even sleeping and that's with a bunk option.
