Tom,
I know you have been involved with Eisteddfod, so you probably know that the present incarnation is presented by the Folk Music Society of New York, an all volunteer organization with no outside funding. Recording the programs of the Eisteddfod and making them available afterwards would be terrific. Who would you find that has time or money to do it?   I believe the sound man records the programs in the hall that has amplification, so that is a start.