There are two ferries going to Curonian spit from Klaipeda. It's not possible to hitch those ferries since you pay per person, not by car. Another ferry is for pedestrians only.
You might be able to hitch a sail- or fishingboat however.
Just a short ferry trip from
- Infoshop in Klaipeda is no more, but FB group could still serve a nice channel to meetup with nice punks in the city.