In the late 60's I spent a lot of time there. My dad was light construction foreman for the MT Fish and Game for this district and I spent several weeks there while we expanded the camping (the park was open to camping overnight back then) and picnic areas (I spent several days riding a mower around the park), put new shingles on the old Plenty Coups house (I got to sleep in one of the second story bedrooms a few nights, in a sleeping bag), replaced the boards of the porch (the ground underneath was loaded with beads that where lost when the women where beading clothing many decades before.)
Great video. I need to get out and try a POTA activation. I had plans of bringing my radio gear to Hawaii with me and trying to activate a park while we were here. But got to spooked about the airport's not allowing me to bring my equipment or my battery. Everything I can find on the website show that I would have been okay but. I know how my luck is lol