We are on a similar schedule this September. We're scheduled to arrive the 5th around lunch and leave the 9th around lunch, so we are trying to maximize park days as well. We also have MNSSHP tickets for the 7th (as well as the Keys to the Kingdom tour during that day) We are enjoying Food & Wine the 8th, and I'm hoping to maximize our Animal Kingdom and Pandora experience on the 6th. The only things I have left to do is book this party and make fast passes. At this point, I'm not sure which will come first.
It did not even occur to me that MNSSHP is going on during that time period. We might do that party and the DVC event without paying for any actual park tickets. We were also potentially planning on hitting up Universal instead and doing the DVC event as our only WDW park experience.