I'm looking for last minute and there are some deals in the 750-850 range which is great. Anyhow, the plan is to see the following: 1. Tulum 2. Xelha 3. Chichen-Itza 4. Ek-Balam I was wondering what would be more advisable. Buy the tickets online at their websites or wait until I get to Mexico. Or perhaps just rent a car? Never been to Mexico. Just want to know what the others have done.