Heya Steve,
I haven't read all the posts in this thread, so forgive me if my post is just a repeat of things that have been said before.
That being said, to the question "what would you do", my answer is this:
I'm nowhere near the level of discipline and will power that you show in all the things that you do. So for me, this question is one I cannot honestly answer. The biggest thing I've done so far, is a 30-day-trial of being a vegetarian. That was difficult, to say the least, but your inspiration helped me through the last part of it. Also the knowledge that it's temporary and only 30 days max, made it doable. I would have never done this if it wasn't for your posts about it. I also doubt I would've ever done it longer than 30 days, let alone 92.
So, looking at this fest thing, I can only say, I would never be able to do this. But that's why I love your site, you inspire and show what people can do. Now that does not mean to me, that you have an obligation to your audience. I think one of the cool things about you is that you are a great free thinker, that follows his own path. And you are also someone who believes in following their heart/feelings, instead of living up to other people's expectations.
So, if I can give you some advice, then, it would be: Do what feels right. Finishing this fest, just to finish it, isn't what you are about, I think. You inspire me, because you go deep where most people don't, and show us the beauty underneath. Now if you find in this experiment, that it isn't as beautiful as you would expect or want, than that's cool too. You are about personal development and sometimes that means discovering what is NOT for you.
I think I'd rather have you write inspirational about stuff you love, than about you grinding it out, digging deeper and deeper within to do something that you really don't feel like doing. Also, what would you do if you didn't have this blog? Just in case you forgot, you own this blog, not the other way around

.
Good luck whatever you do, and just know that you'll have my respect and admiration, no matter what you decide.