I have trimmer racks welded on my trailer and I even have a cage custom made to hold my weed eaters, blowers, sprayers and all of my gas cans. I also have a hitch lock for when my trailer is not connected to my truck and a pin lock when I am on the road. Thieves move real fast! So never take your eyes off your stuff. It cost you too much.
One more thing, never let a guy distract you with petty conversation. Because while he is talking cheap talk to you someone else will be cleaning you out.