I had the pleasure of an inspection last year. When I first got news I was out on military training in the US and the AB FO was phoning my wife wanting to do an inspection without my presence.
I gave him a call and he started asking silly fishing questions like:
How many firearms do you own? (He knew and had the computer open infront of him)
How do I store my firearms? (Locked with restricted double locked, etc).
He finally said that I had "alot of firearms" and he wanted to do an inspection and that three transfers were not going to go through until the inspection was complete.
I agreed to the inspection and if you refuse, they can get a warrant and kick down the door. I also booked the inspection upon my return (six weeks later) and I asked him to stop phoning my wife which he did.
He showed up for the inspection with an RCMP escort and had a list of all my firearms. I had to show him my storage facilities, match each serial to the firearms on his list and if any firearms were not present in the house, I had to account for their where-abouts (gunsmithing, etc.). Took about three hours and they were rather pleasant. I ended up getting my collectors license and the three transfers went through quickly afterwards.
They only asked to see my gun safes and didn't want to see my ammunition or any other parts of the house. What raised the red flag was I purchased three Tariq pistols in hopes of them increasing in value one day. I guess buying three 'identical' firearms makes you suspicious in the governments eyes.
I also wrote a letter to my MP and his office was good and said they could not do the inspection without my presence and if my wife was hassled that my MP would get involved in protecting her.
The problem is that the law states "reasonable" and that leaves it open for interpretation.
I think we should be worried about the illegal firearms and the firearms that law enforcement doesn't know about, not the legally owned and registered firearms that are stored properly.
What does an RCMP officer need to worry about more? My registered and legally stored firearms when he knocks on my door for some reason? Or the illegal/stolen sawed off shotgun when he comes to the door of a criminal?
The firearms you don't know about are the ones you need to worry about.