DMIL doesn't like cooking for Christmas, DFIL wanted to see us. I suggested months ago that we came with food and I cooked at theirs... they said great! and we'll buy the turkey. I asked an AIBU about this and was told unequivocally that this was a terrible, terrible idea.
Christmas Day was lovely - in-law family all relaxing in the front room, I happily cooking in the kitchen - they got catch up time, I got to spend some nice time with them but have a task so not making too much idle conversation. We all had a lovely meal, I got to eat the turkey and trimmings that DMIL wouldn't want to have cooked, nice appreciation all around, lovely Boxing Day walk and home after 48 hours. Not to say it all went according to plan of course... who copes with one roasting pan and no whisk?!
Just to say, sometimes when you ask an AIBU (but do it anyway - dons tin hat) it can still all end up alright in the end... 