Well, after much debate and consideration, we've decided we will have to cancel our trip to WDW in September. Though I think I will use the term "defer". it's a little less painful....
With the neck surgery last December, the shoulder surgery this past Tuesday, and the upcoming knee surgery, it's reached the impractical stage and I just can't justify going now with so many restrictions.
The shoulder surgeon told me on Wednesday that I need to wait a minimum of 4 weeks before I can have the knee surgery, and he would recommend 6. That would put the knee surgery towards the latter part of July - and not really enough time between then and September to complete the physical therapy and be able to walk around for 14+ hours a day for 8 days.
Oh well. We decided to re-plan for late April/early May 2012, our second favorite time of year to go. By then, I should be free of all restrictions from everything, and able to ride everything to my heart's content