Getting around Iceland is rather easy, since there are few roads. Because Jokulsarlon lies along the major ring road it is easily accessed. The two best ways are 1 rent a car from Reykjavik or 2 rely on the highly efficient, very punctual public bus that will happily drop you off for as long as you like. Because car rentals in Iceland tend to be very expensive well in excess of $150 per day for a compact Suzuki SUV their public national transit system is outstanding. Buses can be taken virtually anywhere; take one to Jokulsarlon, stay for a few hours, then catch another headed in either direction along the ring road.