To go to Chichen itza we only had to catch a public transpo from Valladolid that goes to Chichen Itza every couple of hours or every hour. The ticket was horrendously over priced but we were there and bought it. There were droves of people and I am surprised we were able to take pictures without people in the background.
Visiting Chichen Itza for me is only a 2-3 hour thing. By then you want to cool your heels back at your hostel and get ready to pack up and leave the next day on to some other exciting place in Mexico.
We stayed at the hostel called Candelaria, it was really a colorful place. If you have more time to explore around Valladolid then you can probably go to other water cave holes called cenote (read as se-no-te) .
Breakfast was a meager affair of bread, eggs, jam, butter and coffee but buns were heated and the atmosphere at their outdoor dinning area was cozy with some friendly mosquitoes.