Guessing it's a small aircraft that Katana. AirHauler's wonderful map is telling me the closest airport between Petropavlovsk-kamchatskiy is still Japanese - RJCN - although UHSS may scrape a bit closer. You can always use some of Joe's infinite funds to buy a 50-gallon tank and store it in the passenger seat, that might get you a bit further. Try playing around with the configuration a bit. Both airports I mentioned are over 8000ft, so if you are overweight you won't run out of runway. Good luck!