The park wardens have created several excellent maps of the region. The park map (350kr) is a useful 1:55,000 plan that ranks the local hikes by difficulty and is also available online.
The Útivist & afþreying maps are also handy; #3 (790kr) zooms in on the Ásbyrgi–Dettifoss route.
Drones are prohibited in the national park, except with permission from park authorities.
When Rte 862 is sealed and visitor numbers climb as a result, facilities and transport (like buses) will likely change. It’s worth checking the park website (or visitor centre) to see what’s new.
There is a summer-only ranger station at Vesturdalur.
Gljúfrastofa Visitor Centre The super-helpful national-park visitor centre at Ásbyrgi (just off Rte 85) has an information desk with brochures and maps for sale, informative displays on the area, and knowledgeable staff.