I've already made all of the items, save for isabelles hat because I don't have leaf tickets. I've sold most of mine, but I keep 50 just in case the event returns or something. I'll probably sell them off, though, to fund my camper loan.
I've got about 700 on hand now... and I've purchased all the items. It's true, they are everywhere! Might as well pick them up as you can eventually unload them for lots of bells.
I was going to stop at crafting 2 of each item, but then I decided my campers want to be KK groupies. I'm hoping to get enough for my 8th KK hat before the event finishes. I'm currently at 25.