Bill Watson
En-Route
Hardcore? Perhaps. I guess it depends on where you live.
Yes but you need to be Instrument airplane rated, and have a properly equipped glider. People have dabbled with it to climb in clouds in the old days, figured out it ain't any faster. Modern times the wave records flown over the Sierras are done over FL18 IFR with block altitudes.So can you do IMC in a glider?