Trying to figure out the easiest and fairest way to do Christmas this year. First year with DS and married, normally DH just go to our own families.
My family is DPs and DSis, Christmas is all day, dinner, Christmas films/TV, nibbles and extra desserts in the evening , walk with DDog to look at Christmas lights. Approx 20mins/half hour drive from ours but I can't drive.
DHs family is different. His DPs live walking distance from our place, he goes for breakfast, comes home, goes back at 3 for dinner, home after that. His family is DPs, DBro, Aunt, cousins, their partners and this year one cousin's baby. Ok think that's enough background for what we both expect at Christmas 
I asked what he thought we should do and got a 'it's September'
. I thought Santa at home, his DPs for breakfast, then on to my DPs or them to ours for lunch, his for dessert or call over in the evening. Everyone gets a visit/to see DS.
DH thinks we can't have my family without inviting his. We could fit mine (since it's 3 extra people) but if we ask his we have to bring all of them since they all have to do Christmas together. He has said he refuses to miss the dinner in his DPs and won't eat in mine. My thinking was since he isn't really into Christmas and there's more people at his ,1 less person won't be a huge deal for the dinner (esp since we can see them for the breakfast and evening if they want). His suggestion is Santa here, he drops me and DS to my DPs and we do separate for the day. This suits me fine however I can tell his brain will kick in closer to the time and he'll realise that means he will only see DS for the morning. My family going to his isn't an option.
Does anyone else do this kind of split for the day or does it sound like a disaster in the making?