Ohhhh... CAN I COME?? How fun! I'm jealous. I'm trying to plan our summer trip for next year and believe I've found where we'll be going. Yucatan Peninsula (mexico) in a very quaint little town called Puerto Morelos outside of Cancun. We don't want to stay anywhere too touristy and basically want to just sit on the beach. So, we found this place.
http://www.casitaluna.com/
They rent a 3-room condo for $150 a night!
Sorry to take over your thread - I'm really excited for you!!