1968 GMC Recreational Vehicle Guide for GMC Salesmen. Americans, with more leisure time than ever before at their disposal, are creating a growing market for all types of recreational vehicles. This leisure time, coupled with a rise in persoanl income and the rapid growth of our national highway system, has chnaged the recreational habits of thousands of families. Traveling vacations are commonplace today, with extended trips a frequent occurrence throughout the summer vacation season and throghout the remainder of the year as well. Since most recreational vehicle prospects have limited experieince in selecting and equippping a vehicle for camper operation, a great deal of responsibility rests with the salesman. The purpose of this manual then is to enable the GMC Truck salesman to assist the customer in choosing the most suitable vehicle and all required equipment for maximum service and enjoyment.