Ferries shuffle vehicles across the lagoon between 05:00 and 02:00 or thereabouts. You're unlikely to have to wait more than 30 minutes for a ferry during the summer, but may have to wait a little longer at other times. Everything is explained in Lithuanian only, although a few helpful pictures have been provided that give an indication of what one is expected to pay. Payment is only necessary when travelling onto the Curonian Spit. The trip back is free.
Buses 65 - 160Lt, cars 40Lt, motorcycles 18Lt, foot passengers 2.90Lt, bicycles free.