Hey bud, I’m not a pro but do have some info for you.
Things to considder first: Are you willing to put up the prize, or want site to fund them?
If you are willing to put up some or all of the prize pool look into PokerHost.com or Poker.com.
My alltime favorite is TitanPoker.com
Titan offered me several ‘free’ freerolls after referring just one real player. They have been very generous. I’m not sure if I’m allowed to put my affiliate links for those sites up, but you can please join as my sub affiliate if you like. Go to http://www.affreerolls.startingchips.com and you’ll find just a banner for these sites. I’m way to tired to add more info there for ya. If you are already an affiliate at those sites, Best Wishes for your BIZ…