Hi there,
An organized
tour around
Tikal is the best way to go about it, specially if you intend to visit the Tikal pyramids and the great Tikal Mayan temples. If you booking a tour, consider to book a sunrise tour, that way you can get a chance to enjoy the ruins at Tikal before other tourists arrive.
If you decide to
tour Tikal on
your own, your best bet it's to rent a car. Prices for Tikal excursions vary widely, but generally Tikal excursions are quite affordable and should not cost too much.
Hope this helps
VacationBuddy