Hmmmmmmm, this thread has jumped all over the place. I'm not sure your question was answered, but, there is no free dining at the campsites, although you can pay for
DDP. The cabins have been included in free dining in the past. Also, free dining is no longer available at any WDW resort for 2008. Rooms had to be booked by, IIRC 6/25.
ADD: Is it worth it? We did free dining in 2006 and it was definitely worth it. Would we do it again? Probably not. I think the changes make it less attractive. Tips are no longer included and you don't get an appetizer, just desert. Unless you plan on eating at least one sit down meal a day I'd say skip it. Even then, I think the DDE is a much, much better deal. I think the whole plan is just about a break even proposition if you pay for it. JMO.