Wore out the Quicksilver Messenger Service 'Happy Trails album' back in 68
A classic to be sure.

Saw them in '69 and again in '74. Great live performances, though can't recommend this Carousel Ballroom offering. Poor recording & uninspired performance. The Fillmore West concert release is far superior. And Gary Duncan's Quicksilver release Live at Fieldstone, recorded with button mics is exceptional if you like his jazzier work.