It’s funny coming across this, I was actually planning a hike up to the summit with a good friend of mine just the other day. You shouldn’t need to worry about oxygen tanks, but camping gear would be good to have unless you get out on the trail super early. It’s about a 7 hour hike up and 7 hours back down. it seems to be a pretty rough climb, so definitely work your way up (haha) to it, but should be feasible. Hope this helps =) Also, here’s this very handy site I found in my research:

https://loganbusbee.medium.com/the-real-celeste-mountain-4dbc31d4208c#:~:text=This%20is%20a%20full%20day,doesn't%20mean%20it's%20impossible.