Wow, what an adventure. I'm planning on a ultimate coast to coast in 2024. Your write up will be very useful. I'm in St. Louis, so I'll probably do the run to Key West and back on a weekend (2800 miles round trip) and then take off the next Friday for Prudhoe Bay and back in 8-9 days (8000 miles). I'll need an oil change in along the way. Any experience with the BMW dealer Fairbanks?