Originally Posted by
mre5765
They will ask you how long you intend to stay and sometimes they ask where you are staying. Neither question is any business of theirs, but sometimes to go along you have to get along.
Don't they ask these questions to determine the tax status of a person?
On the return, sometimes if your destination in the USA is not near your home or doesn't seem along then way, CBP will ask why. You have good reason: avoid ridiculous Canadian air fares. If they don't buy it, be prepared to show copies of screen shots taken when you were fare shopping.
I think it would be an overkill for a GC holder. As a LPR, you don't have to prove to the CBP your right to enter the country given that your absence was less than 6 months.