Had this situation many a time when I was brand new, I just stayed at the back and let them go off. They'd end up waiting around for me to catch up later since I never felt the need to push myself when new... Plus I didn't want to be in the middle, far too much pressure makes you giddery and then you feel like you're holding up everyone. I don't see the pack staying together as essential... as long as everyone ends up at the same destination who cares.
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