I’m afraid I only know US law and practice. The Canadians are nice people though.
2 Rules for US entry are probably the most relevant:
One law (INA 212(a)(4)) states that an alien (yep that’s you) is excludable if at the time of application the officer is of the opinion that you are likely to become a "public charge" (I.e.: go on welfare, free health care etc). They can consider any evidence. Most just talk their way through. If documents become necessary, lots of people show bank statements, credit cards, guarantee letters from parents promising to cover your costs if there were ever an emergency, etc. It should be relatively easy to convince the officer that, coming from a first world country with a booming economy and an established welfare system, you aren't entering the US with a eye to the US's more limited welfare.
Falling down on that provision is very rare. When there are problems its usually because of another provision (INA 214(b)) where the officer thinks you are trying to move to the US. The law requires the officers to believe that everyone wants to immigrate into the US until you convince them otherwise. If you seem poor you might be looking to find a job in the US. Again its usually just done with a conversation and, if they want to see documents, there is no set rule on what you have to show. You just have to demonstrate to them that you are really on holidays and will leave the US.
Got things like a job offer in Europe or a flight ticket home? That’s useful evidence if there is ever a problem.
Have a good trip.