We ran into this question just last Friday. We were at the PPL lot in Cleburne to take a closer look at two coaches that fit our requirements. We sat down with a salesman to ask the very same question. His response was that they had no problems with a test drive. They did have a prescribed route though. I told him I'd be willing to drop $50 on fuel just so that we could head the 45 or so miles west on US Hwy 67 to tackle Chalk Mountain and see how the RV does on grade.
I am slightly intimidated by the Class A RV. Not that I haven't had experience with larger units. We regularly haul hay, equipment and cattle. But, I am used to having the tow vehicle shorter than the trailing unit. When we get our 30 to 34 foot coach, either of the two Wranglers would not even be half the length of the coach, and I am having problems seeing the dynamics of cornering in the tight areas we routinely see - which would be the ubiquitous courthouse square in the county seat every smaller Texas highway must pass through. And it seems that the highway you're following always has to make a right turn when you get to the courthouse (TX 144 to TX 6 in Meridian, southbound - TX 144 at Glen Rose, northbound, and anywhere through Hillsboro!).
I am not intimidated by the bulk of the RV and toad, I routinely haul loads that exceed most diesel coach weights (gross, with diesel PU, 30' dovetail, lotsa hay). I guess that I will spend time maneuvering around the parking lot and general area before I set out for a long haul.