Correct me if I am wrong. Messing with my spreadsheet it would seem that for lengthy stays (in my case 10 nights), if you want to stay at a WDW property (Not SoG), your best financial plan (barring any discounts/offers) is to book room only and get the S&S tix from SoG.
From what I can tell if I do that, and Disney does indeed offer the 35% discount again next year, I can book two rooms at POR instead of the Junior Suite at SoG and it will only cost me an extra $500. SoG is nice (I have stayed there before) but we stayed several times at POR when in was Dixie Landings and it holds a lot of sentiment for us.
Of course if they do offer the discount Poly is also a possibility. I have always wanted to stay there but even with the discount I could only afford one room and I am not sure my wife, myself, 21 year old daughter and 19 year old 6'3" son would be comfortable in a single room. AAARGH!! I hate making decisions!!
if the hot tub is closed due to pool construction when we go in a few weeks. He keeps talking about how the hot tub will do his back wonders! 
I looked it up and that festival goes from the end of Sept. all the way into November. I can only hope that, at the very beginning of the festival, the crowds will still be low to moderate.
