The tow truck operator should know, but beyond removing the prop shaft and making sure the parking brake is released there isn't much else. You're obviously going to want to make sure storage compartment doors are secure and that nothing is going to fall off of it.
My 31-footer was towed to my house with one of those lift-by-the-front-tire rigs. I didn't realize they made them so big - I thought they were just for cars. Massive pieces of machinery.
Oh yeah - I don't know what kind of overhang you have behind the back axle but if it's a lot you're going to want to pump up the air bags as much as you can (if so equipped). They put 100 PSI in mine so the rear didn't drag when they lifted it by the front.
1984 Allegro M-31 (Dead Metal)