If you're coming from Vancouver, it's going to take over 5 hours to drive. Allocate more time if you have kids prone to car sickness because you might need to pull over and get them some fresh air and a break from the windy road
Once you see this sign, celebrate that no one threw up driving up the windy road
Mt Baldy is still a relatively unknown and under developed mountains which is great for lift line (i.e., there are none) but there aren't also a lot of accommodations on the mountain. Book early especially if you want to go in prime ski season. We booked Wapiti Creek lodge a year ago. It is the perfect set up for 3 families.
Once you're settled in, there isn't anything left to do except
EAT
SLEEP
SKI
RELAX 
and REPEAT (for as many days as you can!!!)
We were so impressed how well the kids kept up this year - not saying there weren't crashes or anyone getting stuck in tree wells but for the most part the kids were ripping between the trees on black diamond runs with ease. There was lots of powder so real injuries, just exhausting to dig yourself out of the deep pow 
We had a great ski train with Simon leading the way and all the lemmings (I mean kids) following behind.
One thing you probably didn't think you'd need on a multi-family ski trip is a strobe light. Everything is better with a good playlist (cue Michelle's Baldy Bumping beats) and strobe lights. It makes the mundane things like cooking and washing dishes together more fun and great for post-dinner dance and limbo parties.
That's a wrap on the 4th annual multi-family ski trip. I hope we'll be doing this until all the parents are getting senior rates on ski passes!
