Around our area we have year round tourists as well and one thing that seems to bring them in are historic tours especially ones that revolve around "Ghostly Happenings" These are usually held early evening and by costumed hosts. I have taken several in my area even though I am not a "tourist". If you have a love of history this might be something to look into.
Are there campgrounds in the area that have significant use JQ?
If so, I`d personally consider starting a conveniently located camping/campers supply store selling the consumables and camping stuff the visitors routinely need.
You could also sell in that same shop an extended line of tourist curios and/or seasonal stuff (like beach products for example) too. (Or... spin-off with a partnered-up biz - or start a biz-coop in a larger building - or.... lots more ideas, but that can wait for another post.)
For a really `low-buck` start, try going with a "mobile-canteen" using a well-stocked larger-sized step-van full of "fast-turning" fresh foodstuffs, canned goods & misc. consumables... then cruise the campgrounds (by prior arrangement with the owner/operators) on a regular & routine basis/schedule.
NB: In my area - with a lot of seasonal lakeside tourist trade - there are several of each of these options operating with a large measure of success... and... they are quite EASY to start & run!
When was the last time you tripped thru` the yellow pages of another large "touristy" city with similar characteristics? Then, compare what they have for businesses with what your area doesn`t have. (Use the indexes only, you don`t need any details at this point.)
I`d bet that youll find at least several dozens of new, unique possibilities that fall within your capabilities.