I have found additional points on the rent/trade board. Have always been very successful. I agree with the pp, the major problem will be getting the reservation you want. Not only F&W Fest, but Mickey's not so scary Halloween.
We rented for the 1st time about a month ago. Since we were looking on TSS for a resale, we opted to go through them (they had expiring points that needed rented). It was a pretty painless process.
You could also inquire with David's Rentals. They are a sponsor on this board and I have good luck with them - although this October would be a tough one.