Campamento El Chiclero,
Uaxactún, Petén, Guatemala
The rooms at El Chiclero are basic, but clean and comfortable and it is a friendly place. There are plenty of clean bathrooms and showers, though none are en suite. This place also has very good food and the owner, Neria Herrera, is proud of it. If you arrive by the first bus, it will be 4:00 PM or a bit earlier when you arrive and there will be time to see part of the ruins. To get to El Chiclero, get off at the comedor and go up the hill alongside the old airstrip. Look for the green building on your left. If you arrive on that bus instead of the later one, you will have some time to see Group A and B up the hill, but it will be best to check in and drop off your pack. You can even place an order for your meal before heading out and have a meal awaiting you. You are unlikely to need reservations for rooms, but the phone numbers are 502 7783-3917, 7783-3918, 7783-3919, and you will need to speak Spanish.
Don't expect a really quick response, but you can also try and e-mail Neria in Spanish at --- campamentoelchiclero (at) gmail.com. It is a valid address, but to arrange a trip shortly ahead of time, you need to call.
Be sure to ask to see the museum on the grounds of El Chiclero. It has a wide range of Maya ceramic objects, some of which appear in notable books on the subject. There is no charge for seeing the collection. To get to Uaxactún without a tour, see this page.
You can also arrange trips in the back of a 4 wheel drive truck to ruins such as Naachtún, San Bartolo, Nakbé and Río Azul from here. For seeing those, you should definitely make a reservation unless you have a day or so to spare.