There was a German student who, in the very early 70's spent a summer at
Pearblossom. He had use of a Libille and would fly out as far as he could
go, tie the glider down and hitchhike back to get the trailer...

Sounds like Peter Reichelt (?), who also flew his Phoebus B in Santa Ana
wave out to Catalina Island and landed there. Similar loner
endurance/wanderer stories about the French pilot (later a fixture in the
Sierras) who went border to border with his Libelle by auto-launch from
wherever he landed. The guy who went coast-to-coast alone in his 1-23 in
the 1960s