ok, since you've gotten so little response so far, other than Vern:
I almost never travel with the tow bar, and I don't expect a commercial operation other than myself to move my airplane except for ROSIE, another RV -A! driver, or someone that I've given permission to. No, really, we've been back and forth all over the country, and beyond, and I just simply let the ramp and FBO people know how much of my life I have poured into this "thing" and that I want to place it where ever they want it so that it doesn't need to be moved when I'm not there to move it. I've never had that fail so far. If it looks like the FBO simply can't accommodate such a request, I would rather tie down outside on a distant ramp (most of the time).
So, it goes like this: You pull up to the FBO ramp and the ramp guy parks you right in front of the front door for your three day stay. Ok, you shut down and shake off the flight while he places some chocks... You hop out and take a sip of water with a smile that you actually made it here and be nice to the guy. (I learn these tricks in secret from flying with other famous RV drivers.) You tell him that you would like to top off with fuel and slip him a few bill right up front. Then you compliment him on his shoes ... or, how smokin' hot his wife is, your choice, then go on to explain that clearly they don't intend to leave your airplane here. "So, where would you like me to put it?" Do you have a spot where I can push it in myself so that you don't have to move it at all? ... It almost always works.
I've seen the extremes on both ends of competence moving an RV -A! of commercial operations you don't know. From completely clueless, thinking they're going to just "hook" up to your custom wheel pants with "the tug", to the guys at the FBO in Aurora Oregon. Ha, that was my huge exception, I paused for a moment when we hopped out and they said they would move my airplane "over there", uhhhhhhh,hhhh, Yeah, OK go for it, I turned my back and off we went.
So, when traveling, NEVER, EVER, trust but your fellow RV driver. If you come visit me in my hangar or on my ramp, you must be OK with me moving your airplane (Rosie, you listening?), other than that, move it yourself or drive some tiedowns in the grass off the ramp and set it outside.