Jeebis you cooking for the offensive Line?
LOL... Fed the entire crowd (12 adults, 9 kids) with just one of the 4 butts, and had leftover to send home as a care package to my wife's brother-in-law who didn't make it due to recent knee surgery.
But I shredded all the rest, packed them up in 1# increments in food saver bags, and sent them to the freezer. We use pulled pork in a bunch of other dishes, so it's good to have on hand. Or even for sandwiches if we want to just defrost a bag for a quick easy meal. Obviously there was a lot of weight loss during the cook, but I think we ended up with about 11-12 frozen bags for future use.
The way I look at it is the same way I look at brewing beer. It's basically the same amount of work to cook 4 butts (Costco sells in 2-packs, so I buy two of those) as it is to cook 2. Just as it's basically the same amount of work to brew a 10-gallon batch of beer as it is to brew a 5-gallon batch. The increase in labor doesn't go up anywhere near linearly.
So if I'm going to fire up the smoker, spend my time, use up a bunch of charcoal, etc, I might as well make it as worthwhile as possible. I have [barely] the freezer space, so why not?