Ok Ladies... Ill tell you what I know so far. I'm getting married there May 4th. so I feel your pain with all these unanswered questions.
As far as the outside vendors, you can bring them in, but they will have to have the daily pass. I'm not sure how that works out exactly. I know some other girls have had their flowers brought in by a florist that is from Cancun and since they just needed to be dropped off, they didn't have to get the day pas. If you chose your own photographer, like I have, you will have to get them a day pass as well. My photographer is Juan Navarro. I personally was not impressed with the smile market photographers. I'm also getting my make up done by and outside vendor and someone told me to get them just a kids pass since they wont be there all day, they will only be there to do my hair and make up and then leave.
I just found out that you can bring your own linens and centerpieces etc. Please remember when booking the packages for the ceremony, that you realize that is all you get. Its for the ceremony ONLY. None of the decorations or chair bows or anything will carry over to the dinner or cocktail hour. Since I found that out, I decided to just do the complementary package and add to that. Plus if you bring your own linens and such i can guarantee that it will be cheaper than getting a package. they will charge you a small set up fee when you bring your own items, but its reasonable.
If you don't want to bring your own stuff, they do have someone that will bring everything in for you. I think its called Zuniga or something like that. however.... i was getting charged over $900 for the linens and chair bows. and I'm talking for only 40 people. Its really hard when you cant really talk to anyone until 3 months previous, but i have done a TON of research, i have been in touch with someone from the resort and this sight has been such a help!
Hope that helped at least a little bit.
Let me know if you have any other questions i might be able to answer. When i get back I'm going to do a full review with pics and everything!