Question to those who brought in a US tagged car into Canada
 

I got a lease and a car loan that I am still paying and I may have to move from the US to Canada.
Someone told me to get a po box in a border town and then just drive my cars with a US tags, but I feel that may not be the perfect thing to do.
Anyone has suggesions?
Otherwise I'll just have to pay for the cars and park them somewhere...