I took the a fair amount of kit with me travelling the Yucatan from the beach at Tulum to the sites at Coba, Uxmal and Chitzen Itza, to the colonial town of Merida, and ending up in Mexico City / Teotihucan.
The least used were my tripod (not allowed on archaeological sites) and my 15mm fisheye (can't use tripod, so can't take the 9 or 27 shots required for a VR).
The most used lens was my 70-200mm, fantastic for detail and people shots.
But I would have regretted not having any of my other lenses with me (15 fisheye, 16-35, 100 macro, 24 ts-e, 70-200 and 1.4x tc). I actually regretted not taking my 24-105, as I missed the IS for internal shots and low light shots, especially with the tripod being not allowed nearly anywhere in Mexico.
If I were you, I would not even think about leaving anything behind. You may struggle a little with the lack of wide angle (24mm on 600D is not wide at all), especially with the scale of the Mayan sites.