I learned about the air bags on my Berkshire the same as you. My procedure which has yet to fail me is 1) start engine 2) allow both air systems to reach 125 psi 3) hit power button on jacks 4) hit retract all 5) wait for system to indicate all jacks have stowed 6) visually verify all jacks are up 7) drive away.
I agree driving 85 mph is very dangerous. As conceptumator stated 64 mph and 1700 rpm is optimum for fuel economy not to mention a much safer speed.
2013 Berkshire 390RB-60
toad - 2002 Jeep Wrangler Sport