Originally Posted by
armeee
Are you telling me that once I arrive in YYZ that I have to get my checked luggage and re-check them in for my flight to Vegas.
Yes, you'll have to get them from the US-bound baggage belt - you have to have your bags to go through US Customs & Immigration, where you can re-drop them on a bag belt. No lineups at a check-in counter to worry about. You'll have to do the same thing on the way home - collect the bags at the CBSA, and drop them after you've cleared customs at a connecting baggage belt.
Enjoy the trip to Vegas!!