We were detained and harassed for a few hours at the border. When they finally said that we could now enter Canada, I was so pissed off at them that I asked where I could make a "U" turn back to USA. It just takes one border guard who had a bad day to ruin your trip.
He didn't ruin your trip-you did by letting someone who's only doing their job get under your skin. Someone who is traveling from one country to another with no plan is often deemed suspicious. We were detained entering New Brunswick once years ago-the agents who boarded our RV were only doing what they were paid to do and that's keep their country safe. I've had far worse issues trying to re-enter the states. I hold no ill will towards anyone in that position trying to make this world a safer place.
