Sorry to OP, but I will share a short story here on one of my last crossings
was a vacation trip m=not a hunting one and NO firearms involved, but I crossed into Canada problem free!, was there a week or so, and on way home I hit a major sleet ice storm, entire truck was coated with a 1/4 inch or more of ice and just keeping the windshield clear was a challenge.
when I got to the border, the USA side, did there regular basic Q$A< but apparently the one agent didn;t like the fact we were hunters and claimed to NOT have any guns(was late nov)
we(me and a friend with me) had Camo on!
so, they decided to pull us off and made me park truck in a HEATED garage
and proceeded to search the whole truck, removing everything from the inside, had a drug dog in the truck and such !
We didn;t really care as we had time to kill, and heck, them doing this also de iced the whole truck for use, as they even had to use water to melt the ice to open things, as ice layer on truck was so thick LOL
we laughed at the deal, to be honest! as we kenw we did,had nothing wrong to worry about!!

And honestly they did us a favor DE icing us
BUT, I have crossed this same border location a few dozen times without ever a pause!
they never found anything wrong and again away we went, but I still say it can happen, based on the folks working that day and what they FEEL about things!

I am NOT the type of person to cause issue's here, I normally get along with law enforcement and like folks VERY well, worked with thousands of them, so have respect for most of them! and even these I didn't find BAD< just one had a issue with Hunters it seemed and happened to be in charge, and this again was entering the USA , my own country! not the Canadian side of things!

NOT sure what would have happened had we been hunting and had animals and or firearms with us< Might have got stripped searched LOL

but just shows that some times even when all is GOOD things can turn into a bigger deal at border crossings!

and again, I have entered Canada countless times on snowmobiles as well as cars and trucks over the yrs problem free!