Sorry, but this seems like a blonde moment..
Would it not be just as easy to go out and take 55 ( 54+1 ) pictures BEFORE the event and be done with it ? Rhetorical question..
Reminds me of way back when everyone ( in the military/Army ) - just before New Years 2000, when the upper echelon believed that all of the computers were going to stop working when they rolled over to 01-01-2000 00:00:01 AM. At least at this one post, their "Grand Idea" was to station a soldier at every computer and watch it roll over- effectively ruining their New Years.. OK- WHAT IF it did stop functioning- then what ? Buy new computers ? Commit Hara Kiri ? What ? None of them gave a thought about just changing the time, on the computer, ahead of time- to 12-31-1999 23:59:00 PM and watching it roll over ahead of time- and see if it was OK! Really though- this was their best plan- yep- station a soldier at each computer- and watch it roll over..
So, yeah, my response- go out - take another 55 to 60 pictures beforehand- and you're done!
EOS 5D III, EOS 7D,EOS Rebel T4i, Canon 70-200 f/2.8 IS II, Canon 24-105L, Canon 18-135 IS STM, 1.4x TC III, 2.0x TC III, Σ 50mm f/1.4, Σ 17-50 OS, Σ 70-200 OS, Σ 50-500 OS, Σ 1.4x TC, Σ 2.0x TC, 580EXII(3), Canon SX-40, Canon S100
Fond memories: Rebel T1i, Canon 18-55 IS, Canon 55-250 IS, 18-135 IS (Given to a good home)...