If you are going to rent a jeep -- understand what the insurance provides. Your insurance from home does NOT cover you in Mexico. In addition, rental cars outside of the US are not like the ones here. What happens if you break down?
Do you know the roads well enough? How will you avoid getting lost? Outside of the main tourist areas there are parts of Mexico where you could be setting yourself up to be robbed, car jacked or worse.
Yes, I know some of those risks are everywhere, but please for safety's sake, plan for them so you can avoid them.