Recently I bought the anniversary edition of Rise of the Runelords, and I was wondering if there was any supplemental material needed for this adventure path, or anything that people could suggest that could be added before I begin using it? I know that some people have had changes made to some adventure paths because of things left out or whatnot, was curious if Rise is also an adventure that may need tha as well.
Lots of discussions on the boards for errata/updates that might be worth looking at (sorry, no handy links at this time). I also own the pawns/cut-outs for RotRL, but they are not strictly necessary.
I suggest you to read the forum here. Especially, but not limited to:
Community created thread
and
bringing Sandpoint to life
There are a lot more, this AP has the best community created material of all of them