I went to St Anthony's in Idaho. It's about 13 hr drive from Edmonton and well worth the drive. If you go to Oregon sand dunes you will have to jet your bike if it's a two stroke. Cause those dunes are at sea level. And buy sand paddles! You won't regret it worth the drive.
Rexburg is way better IMO than the Oregon dunes and it's way closer dunes in rexburg are 10 times bigger than the Oregon coast definitely need paddle tires just call ahead to rexburg motorsports and make sure they have what you want way cheaper thn buying stuff here