I recently did the CAT scale with a Class C motorhome and toad. True, the call button is a tad high, but a walking cane or long stick works fine. I think I paid $9.00 in FL. The concrete drive is divided by lines (cuts?) in the drive and each axle has to be within that set of lines when you stop. The person at the weigh desk will then tell you it's ready and you pull off, park, go inside and get weight ticket and pay. When I first pull on and call, I tell them private RV. No further info needed. BTW, I was well within weights, which means I can do more $hopping!