Thank you all for your suggestions and support.
PrincessCharming, I really appreciate your candid reflections on dealing with your own self. I think a lot of the things you mention, learning about fatigue, learning to monitor myself, are the things I'm going to need to get a handle on to get along on the playa. The advantage I have is years of experience dealing with the playa, to begin with...I know what it can be like out there! I was so glad to hear that you've been able to get to Black Rock City, I can't tell you, though we're dealing with different root issues, the expression seems similar. Your description of the fatigue and muddledness is already sounding familiar.
Gyre, I'd love it if you were able to scare up your friend with MS. As PC was saying, connecting with others, from both my home and playa communities, is going to be a huge support and reassurance for me at this point, not to mention the huge boon of being able to take in others' experiences.
theCryptofishist, I thank you for your practical suggestions, and the referral to the
[email protected] folks. I'll get in touch as my questions crystalize. I also thank you for your encouragement to go. I know it can be done.
I am fortunate enough to have a supportive partner who I've been to the playa with every year since the first. I don't think I could go at this point without his backup, support, and understanding. It's only been a few weeks I've been sick here, just a week since my diagnosis. I've been pretty down, morale-wise, though trying to take this on in all its facets. Starting the planning for Burning Man is part accepting and dealing with this illness, as BM is part of my life. My plan is to be there.
Again, thank you. Reading these posts has set me up for a good day.

Please excuse our noise and dust.