I recently did 10 butts for a vend, only 5 got injected. I cook them for 4-6 hours, foil till finished, hot hold and pull as needed. The non injected ones were fine when pulled but seemed to dry a little faster in the chafer. I just added a little juice that was left over in the foil and it perked them right up. Considering another vend at the end of the month where we will need 30+ butts and I'll be danged if I am gonna inject them.
Dedicated Stick Burner, Pitmaster @ All About The Q, facebook.com/itsallabouttheq KCBS CBJ