Thank you all for the excellent advice and pointers towards other similar threads. The campground locations, airport recommendations, tips about calling beforehand for entrance/exit procedures are invaluable. We had thought about O2 previously as a bring along in case of needing to be above 12,500 for terrain, but it looks like it's a necessity after reading y'alls comments. We have a tank in our hangar that looks like it came with the plane originally (1978 model, and this is a club plane so it's a guess it came with it), but I'm not sure how old it is or last time it was filled. I called a local shop on the field and they said they can check it for inspection dates and fill it, but they can't do hydrostatic testing on it and would have to send it out. Said $300-500 including shipping and it needs to be done every 5 years. Is that right? I'm seeing SkyOx systems all-in that are $500 with regulator, canulas, and a mask. I've also seen recommendations to buy an old tank on craigslist and purchase the regular and hosing myself. With such extreme ends of the spectrum, I'm a little confused which way to go and what I should expect to spend on the setup.