both sides live very close to each other so the swapping years would never go over very well and honestly, as long as they pick similar days, it isn't too bad to get in time with both. But requiring multiple trips to attend all events will likely come to an end.
Do they get along? If they are that close you could do one big happy family party.
My in-laws are in southern Minnesota so that's harder for us. They've come to birthdays and such though.
