Toddler in a travel trailer

I want to take my nearly two-year old camping. I need an idea as to some sleeping arrangements for him. We have the table that folds down to a bed, and a queen up front for mom and me.

My boy never stops moving, and he currently sleeps in a crib at home. The colapsable travel cribs dont really fit, and are not big enough for him (big kid for his age). And he would never stay in a bed without a rail.

Anybody else have a crazy busy kid they take in the travel trailer? How do you fence them in so to speak while they sleep?