I bit the bullet and purchased flights on Allegiant for $217 round trip, flying direct from Ft. Lauderdale to Plattsburgh and then from Plattsburgh to St. Pete/Clearwater direct on the return on a normal-sized planes, where I'd have to hop on a quick flight back to Miami or an overnight bus. Damn me for checking every last possibility and finding these random direct flights that are hundreds of dollars cheaper and much closer to Lake Placid.
I'd have to stay in the area until Monday night, but it would give me a good 24 hours to explore Lake Placid itself which isn't the worst thing.
I can still cancel them within 24 hours and may do so...