I know of 5 or 8 Robinson R22 helicopters bouncing along on trailers behind RV's in the western states, the better to tour scenic spots from overnight campgrounds. Anybody else of that pursuasion show up on this site yet?
I also run into ultralite owners w/trailers at places like Quartzsite, AZ where hundreds of thousands of RV's camp out in the desert for the winter. But they have a limited number of airstrips from which to operate. Still, prospecting and artifact-hunting abound in that region, using micro-aircraft for transportation.
By the way, prospecting for gold using an aircraft provides you no advantage, the prospectors and their mules covered every inch of the territory in the 1800's. All modern finds are subsurface, by drilling deep and analyzing the microscopic gold content for possible chemical extraction. Minimum investment c. $10M. But it's fun to tramp the hilltops around the impromptu helipad with a metal detector and dreams; just not economically viable!
