I dont think it is very easy to judge exactly how much the OHVers bring to an area and use it as a basis for a park. I know when I go on a trip I spend very little money if any in the town where the park is. A few examples:
Tellico: All my fuel was purchased before hand for my rig and the tow rig was probably not filled in murphy because it was expensive. Food was usually brought with me as well. There wasnt anything to do in town so I didnt spend any money there.
Milledgeville: A tank of fuel would get me there and almost home. Once again I probably brought all my food most of the time.
Harlan is the only place any money was really put into the town because it was so cheap there it was easier.
I dont know about others, but as for my self when I go wheeling it is hard on the budget because it is a very expensive hobby. When I got I do it on as small a budget as possible. Now with other hobbies, camping, going to the beach, etc I am more likely to spend money in the town because the initial activity isnt such a kick in teh wallet. I know murphy is a tourism town and there are many people who travel there with the sole purpose to shop and if they left it would have a much more direct impact on the local economy.
I dont mean to be a negative nancy but this is just the way it seems to me. I welcome other opinions on the topic. Its is also hard to tell in an area such as murphy how bad it was impacted because it happened at the same time as the downturn.