Hi cris, sorry for the delayed response. I don't check this account too often. After doing a lot of research it seemed that we were very limited to either Mexico, Cuba, and Dominican if we wanted a catholic wedding. Visiting all three countries, I would say Mexico by far had the superior resorts which would accommodate and please all 50 of our guests. Not to say that Mexico didn't have it challenges in convincing our family and friends to come. Mexico was in the news often leading up to our wedding with a lot of negative press. Our guest definitely had their concerns about the drugs and violence. However, doing a little online research, I found that all the crazy stuff we heard on the new was by the U.S-Mexico borders. We got married in Mayan riviera , which was thousands of miles away from there. It's unfortunate that Mexico as whole has to get such a bad rep because of those areas. Not sure where your group is traveling from, but I would definitely avoid border crossing by car. Our entire group was from Toronto, so we all pretty much flew to cancan and took a transfer bus to grand palladium resort.
Safety was definitely not an issue once we got to the resort. They have a lot of security, just to get in the resort, not just anyone can come in. All of our guests had such an amazing time. Even the most skeptic of our family and friends who insisted in staying in the resort for the entire week ventured out. A lot of them took the public transportation and visited playa del Carmen, a near by town. A lot of our guests also left the resort to check out the ruins.
I would definitely go back to Mayan riviera for a vacation, especially since last time I was too busy with all the wedding chaos. Hopefully this gives you a better insight of Mexico!
Good luck with the wedding planning