It looks like you are coming in from BC, and plan on driving. According to Google Maps, that's a 19.5 hour drive. Having to stop every hour or two to stretch, even for just 5 minutes, to avoid blood clots and such, would add on another 100 minutes, pushing it up to 21 hours. Driving 8-9 hours a day, even 10 hours, would mean this would still take you 2+ days of driving. And that's not figuring in stopping for a meal, or finding a drive-thru, or potty breaks that happen between "stretch breaks". ... And then that extra 30 pounds of weight, all those kids there on Spring Break, all that walking....
And then, like others have pointed out, you'd be 2 days away from home if (G-d forbid) you went into labor early. The nightmare of being that far away from "my" doctor, "my" hospital, "my" birth team would drive me bonkers, along with the realization that hospital charges may or may not be covered. (Admittedly, I have no idea how your healthcare coverage works when you leave the country, but, locally, if someone on our Medicaid program goes into another state to see a doctor, rarely is it ever covered, and we're minutes away from a state border.)
It's tough for me to ever dissuade someone from going to Disneyland, but in your case, I think I'd choose to wait.
