Barbara, how exciting for you! We have the same itinarary in December, and have been musing about Tikal. But it sounds like a long tiring day. I presume it will be hot and humid at Tikal itself as well? At the moment I'm thinking we'll do Chacchoben in Belize instead. My husband David saw Chicken Itza many years ago, and wants to take me to some Mayan ruin or other, but I'm worried that Tikal would be too much for us, heat and walking and climbing-wise.