3 bands, 3 sets? If I got you right then the load will be lighter bro. we are barely two (2) months away and yes you're the only drummer, I'm not sure with Sir Mocho..
in my estimation, brokensauce can play about 6-8 songs. we focus on playing our compositions, but we do cover '90s alternative songs in the '90s-themed production where we're semi-regular. beatles songs may take a bit of practice, especially for our guitarist, but i think mastering 6 to 8 songs by december should be simple enough pag nagamay na naming lahat...
suggestion: let three bands perform half of each set, tapos tayo-tayo ang magjajam for the second half of each set. for example, brokensauce does half of set 2, playing about 7 or 8 songs. our "all-star band" would then tackle the remaining songs in set 2, parang intermission of sorts before the next actual band takes the stage, and at the same time keeping the crowd entertained.
as far as actual bands are concerned, we've got brokensauce and the satellites. kakausapin ko ang brokensauce sa sabado pag nagrecording kami, but i'm almost sure they'll be up to it. maybe we can audition for a third band sa gig announcements kung wala pa tayong mahanap, or kung medyo tight na kami (not to mention, find a bassist), baka pwedeng sumalang yung side project namin ni julius as the 3rd band...
sensya na kung medyo ngarag ang post ko...work day's over and (no pun intended) it's been a hard day's night!