How do you guys lock your Boat Mate Trailers to your tow vehicles? I have a receiver lock for my trailer hitch, and I have a lock for when the trailer is not attached to my truck (for storage). I would like to lock the trailer to the truck hitch ball. Is this done by replacing the small hitch pin with a lock? The hole looks to small to get any sort of substantial lock thru it. Please help, just picked up my new '03 Outback LS and I love it. Great boat, now all we need is better weather. Thanks.