It does freeze well, so that's a good option. Normally I do that, but in this case i actually pulled the shoulder out of my freezer trying to free up some space in there so I kind of didn't want to fill it right back up.

If you've done a whole shoulder on a rotisserie I feel like you'll appreciate this idea too- I've been to a couple parties and done it once myself where we roasted a whole lamb over a fire. I don't have any pictures handy but look up "lamb al asador" to get an idea of what the setup looked like. If nothing else it's a hell of a centerpiece to have for a party.