Thanks for the info, Karl-Heinz. I've never heard of a tape of that show - I attached a jpg of the poster. I'm guessing that there must have been a number of shows that Dawson recorded - wonder if the tapes still survive and if so, what's happened with them? We know that the 1/69 Shrine Auditorium recording survived!
And if anyone's interested, here's an interesting item on eBay from a show at the Grande Auditorium in Detroit from the summer of '68 (not '69 as the eBay listing states):
http://cgi.ebay.com/ws/eBayISAPI.dll...ry=105050&rd=1
(Hey, my signature line even ties in neatly with this
)