I thought it as kind of odd that Steve Miller would be listed as being on vocals and keyboards on 12/24/68 since he plays guitar (in addtition to being a joker, a smoker, and best of all a midnight toker).
I have been doing some checking and I found out that Steve Miller is sometimes confused with Steven Miller who played keyboards in Linn County and later with Elvin Bishop. http://www.borderlinebooks.com/us6070s/m5z.html#The%20Steven%20Miller http://www.borderlinebooks.com/us6070s/l3.html#Linn%20County That sounds like a possibility - esp. since I have seen this listed as "Jerry, Harvey Mandel, Elvin Bishop, and Stephen Miller" Dave S.