My group and I are going to be away with a larger group of friends for a week over new year's. Rather than keep players who aren't members of our group out of the game, I'd like to offer some of the people who don't play with us the opportunity to join in. I'm thinking of using our last session before we go away to launch the group on a side-quest so that the new players don't need a year's worth of context to catch up.
Does anyone have any tips on this sort of thing? How can I best integrate the new players? And how can I make sure that things flow smoothly? Thanks!