Hi there. I don't have any helpful suggestions for where to go to arrange your trip (sorry.) But I do have a suggestion about choosing your destination. I haven't been to Chichen Itza myself (plan to go after the wedding) but I have been to the ruins at Coba and Tulum and know lots of people who have done the trip to Chichen. I think if my guests were staying in the Riviera Maya, I'd opt for either Tulum or Coba only because it's about a three hour trip to Chichen Itza each way (depending on where your resort is). That means you spend a huge amount of time on a bus, and by the time you get there, it's already crowded with all the other tour buses (plus you don't get to stay for the nighttime laser show because you have to get back to your hotel). It just seems like a very intensive, all-day excursion for your guests. I like Tulum because the ruins are on a cliff overlooking the ocean, and there is a gorgeous beach below that you can hang out on. Plus it's doesn't take as long to get there. The downside is that the ruins are less impressive than Coba, and much less impressive than Chichen Itza. But the ambiance of the place is amazing. Coba takes a bit longer to get to than Tulum, but the really cool thing is that the ruins are fairly intact, and there is even one temple that you can climb up. There's not beach, of course, so that's a tradeoff. The grounds at Coba are also quite large compared to Tulum. To me, the benefit of the closer places is that if you go early, you can beat the crowds. Depending on the time of year, it can be way too many people for my taste. Just my two cents.