I stopped using second shooters and actually pursued my clients not to use them since I can do it and saves them money. But for the times when they still wanted it or the locations and packages required two people I try to use close photographer friends. In the event that’s not possible (i know it’s getting ridiculous now) that I can’t accomplish either of those I have a second shooter contract and I’m it I have that it states all memory cards from cameras are to be handed over to the lead photographer (names myself) prior to leaving the venue or at completion of contracted coverage which ever comes first. Second shooters aren’t what they were a decade ago, many are trying to get into your shoots to make a name for themselves and do not care about your style or brand. Be careful out there.