My advice here is get to know them a bit first. Find out whom - if anyone - they've photographed for. Start small, build a relationship. With lots of smaller photographers your bigger headaches will be things like photographers who decide to take your porn shoot to Wal-Mart for development. And I wouldn't advise working with photographers from extremely conservative states. You will get generally good results, on the flipside, from a lot of European and Canadian photographers. And of course make sure you get model release and ID with all sets...(some smaller photographers do not understand model releases).

-doug