John,
Turn the driver seat and the passenger seat 90 degrees towards each other and set the keyboard on them, the bass woofer in front of the pass seat and a folding chair or bench to sit down and play.
when traveling the sound system is in a zip up bag and the keyboard and computer ride on the bed with the bathroom wall in front of them in case of a sudden stop.
OK, I will quit watching the entrance for you
Bebop