My husband is a teacher and every year in Feb/March time he goes on a Ski Trip with the school for 8 days.
We have a DS and I'm currently pregnant so when he goes on the Ski Trip in 2018 our DS will be just under 4 and the baby will be 6 months old. I have no issues at all with him going on the Ski Trip.
After the Ski Trip he is home for about 10 days and then he and DS are going abroad together for a week which they do at least one half term a year.
In my mind I was mentally thinking that 9 days home alone with a 4 year old and a baby whilst DH goes skiing isn't exactly nice but at least I will get some time to recuperate when DH takes DS away for that week.
Anyway, two days ago DH came home from work and said there's another school trip abroad that he's going on which means he'll be gone for four days 
I asked him when it was and he said it is two days after he's back from the Ski Trip!!!

So now he'll be skiing for 9 days whilst I'm at home on my own with the children, he will be back for two days (and working on those days) and then he will be leaving us all to go abroad again for another four days.
So in the space of 15 days I'm at home with the children on my own for 12 of them whilst he's abroad.
And then two days after he gets back he's then jetting off abroad again with DS for a holiday whilst I'm stuck at home on my own again.
I'm no longer seeing my week at home with just the baby as respite but more as a week of being home alone again to carry out childcare whilst DH is off again!
I will hardly see DH that month.
AIBU to be a bit miffed by this?
It's not that I can't handle the children, of course I can, it will just be hard work and it seems so unfair that he can have all that time away from home/family life whilst I'm no doubt going to be stressed and tired at home.
I feel like telling him that it's not fair to leave us for 9 days, come home for two days and then just leave again for another four days....
I know it's his work but when do I get a break?!
He HAS to go on the Ski Trip so I get that, but this second trip isn't necessary, there are other teachers that could go, so would I be unreasonable to tell him I would rather he didn't go and instead spend some time at home and give me a bit of a break/rest from the children after 9 days of him already being away?