Welcome to the forum!!!
Your sister in law is right, this place is AWESOME! Without this site my wedding wouldn't have been nearly as awesome.
As far as advice on photographers, I suggest bringing one with you. Although it sounds like it'll be more expensive, it really isn't.
For instance, I flew my photographer in for four nights. His travel plus costs ran me $2500. BUT, that covered THREE days of photography and all the photos on a disc and 100 prints! That's REALLY cheap!! So instead of only getting a few hours on my wedding day, we really were able to capture the entire trip for the same price. TOTALLY the best decision I made (well, besides marrying my husband and our resort!).
So, what I would do is contact some photographers. There are a TON on this website that you can send Private Messages to. Then, I'd also contact some photographers in your area who you like their work. I think you'll be happy that you did.