I'm getting married at Be Tulum in May and am happy to see other 2014 Tulum brides on here! I think we'll have around 60 guests, though it's still hard to estimate, even 4 months out. We also visited Akiin, which was beautiful - congrats!
I'm also interested in hearing which vendors you are using and will share some of mine below. I also found the rundown from "EssandPea" after her wedding at Las Ranitas incredibly helpful when I was starting to plan.
Venue - Be Tulum. We had to guarantee rental of all 20 rooms for the wedding weekend, but we are just in love with the location. They also have an on-staff wedding planner, Daniela, who has been wonderful (otherwise we would have used Fresa Weddings - Kristee was so professional and nice). Daniela has recommended vendors and will also be our day-of planner.
Reception Food/Drink - Be Tulum, which we tried when we were there in September and it was amazing! We're doing a cocktail hour, then mexican buffet and open bar
Videographer - We're going with Blue Lens Caribe. We decided on 1 photographer for 4 hours, hopefully it'll be enough time.
Photographer - We're bringing our own from LA (gulp!) - Epic Imagery (Danny Baker) - who takes stunning photos. This was one of the most important things to me, so I bit the bullet.
Welcome Dinner- We wanted something fun and casual, so we decided on the sunset bar at Mateo's. We're doing tacos and open bar for this.
Best of luck to everyone in their planning as well!