My heart goes out to you. I’m incredibly sorry for the loss of your baby 
You don’t have to go skiing. How are you feeling physically now? You’re bound to feel a bit shattered and fragile for a while, you might bleed for a few more days, you need to rest as much as possible, eat whatever you want to, keep hydrated and sleep.
There are times when keeping busy and distracted is good and others when you need your duvet, your home, a packet of biscuits and a shit film. You’ve had a massive shock and you’re going to need to come to terms with your loss and your pain.
I found out at my 12 week scan my baby had died at 9+5, tried medical management and ended up with an MVA (ERPC under local). I didn’t bleed much afterwards but I was exhausted, sore, spent several days sobbing, especially the third day after, and I pushed myself far too hard to “get back to normal” whatever the fuck I thought that looked like. A few days after I went to watch my brother in a parade thing with an overnight stay. By Sunday night I was in A&E with an infection, no idea why, but I was really sore and was on ABs and then got bloody thrush! I’m sure you’ll be fine and heal perfectly post op but standing around in the cold nearly finished me off and I worry about you pushing yourself to be “normal” too quickly, getting cold, wishing you were comfortably at home.
If you think being around your family will help as you come to terms with what’s happened then go, but everyone will/should understand if you change your mind and decide you’d rather be home and see people when they’re back.
Please give yourself permission to put yourself and your healing first.
MN was a lifeline to me, you’ll get good support and advice here. Keep talking. It’s so important to have an outlet. Mmc is so cruel because you wonder how to trust your body when you can feel it deceived you! I’d never felt more pregnant when I was having a nervous sandwich before my scan.
It won’t help now, but you will feel better in time. You’ll still miss your pregnancy, the hopes for your baby and for being a mum. Being pregnant is so exciting and wonderful. I hope it’ll happen for you again very soon.
Whatever you decide about the trip, look after yourself and take the time you need when you need it to heal.