there just won't be time to be gone from the house to Whistler from 8am-8pm to ride the bike park. That and the whole injury risk thing...
Ironically, I got back into riding WBP after 2 kids, ours were 3 and 1 this summer. 2 summers ago was the first time I've been back in close to 10 years. As suggested, we make it an annual summer trip for 4-6 days, make sure the wifey gets a day in at the Scandinave in exchange. I found Whistler a pretty chill family oriented place to hang for a stretch of a few days in a row.
I found the 1.5 days I get to ride in the park so much more rewarding, and I don't have to go fast or big to get my kicks these days. The trails I enjoy most, my AM bike did more than well enough for me.
The whole injury scare thing is real.