My wife and I and our 2 children (6-2) will be in Playa-Tulum this July and plan to move on to Valladolid and then a couple of other towns. We are wondering what order we should visit and where we should make our base? We have been to Merida and plan to go back this time as well, but we are thinking Izamal, Ticul. Should we make Merida our base and do day trips? We will have a car and will travel back to Isla Mujeres after about 4 days.