>>2707263PS: The way I'd set this up then is to just illuminate the spot where Santa stands in a way that makes it not matter if you have just Santa and one kid or a small group (siblings and so on).
I'll caution that might mean higher light outputs, so you have maybe 300 shots to work with before swapping batteries, and 1.5-3 seconds cycle time between shots. This is theoretically where more powerful pro studio lights might be nice, but maybe you can just swap batteries at 250 or whatever shots before taking the next group.
PS: Dunno about your Alturas if you already have any - seems like they're also high output speedlights (with TTL in this case?) though, so you can surely integrate them in a RC setup with YN-622C/N.