I think it's a great size, you'll have a great time and make some happy memories.
I have a 27BH, a little shorter with no slide and 4 boys. When they were younger 1-8 the oldest took the top bunk, the second oldest took the jacknife sofa, and the two youngest shared the double bed. They were more than happy with that as we were camping. I had it this way because I refused to setup and breakdown the dinette every night.
Fast forward a 10 years and the youngest takes the top bunk, the second youngest the full size, and the second oldest still on the sofa. The oldest at 18 has no interest in camping anymore.
I never really had a space issue except about two years ago when the two youngest suddenly couldn't sleep together. So I let the youngest sleep in the queen with me until the oldest stopped going.
