I really have to take exception to Big Al's assertion that RVers get a "bad rap" from "truckers who are usually disobeying posted speed limits." Aside from being absolutely untrue, these comments have nothing to do with the issue.
While there are plenty of "problem" truckers on the road, this does not negate the facts that the average RVer is not qualified to operate vehicles of their size, are totally unaware of truckstop procedures and etiquette or that the major chains do cater to them while they produce a fraction of the revenues produced by truckers.
What I, personally, find most objectionable is the arrogance exhibited by many RVers who seem to feel it's their god given right to block fuel islands, putt along at 20 MPH under the posted speed limit (creating backups and dangerous passing conditions) and pack the truckstops and rest areas (because they're too cheap or lazy to use one of the countless commercial, state and federal camping areas) making driver switches for teams and performing basic hygene difficult, if not impossible for those of us with limited options and who are trying to make a living.
The bottom line is that the truckstops would rather have 10 RV's on their lot, each buying 20 gallons of fuel and 2 meals while providing no services (showers, etc.) than one truck driver buying 200 gallons of fuel and one meal while expecting services.