You’ll need a 4WD to visit Yaxhá on your own. The main site is located about 12km (7mi) from the pavement, and it can be treacherous going in rainy season. Because the site is still relatively undeveloped, you’ll want to bring your own water and food.
Your entry fee covers all sites within Yaxhá-Nakum-Naranjo National Park, an enormous 37,160-hectare (144-square-mile) expanse that includes three other major sites: Topoxte, on the south shore of the Lake Yaxhá; Nakum, an ancient port on the Holmul River; and Naranjo, about 20km (12mi) north, Yaxhá’s long-time rival. While you can visit all of them, poor roads and worse maps make that an adventure best undertaken with a guide.