I bought a padlocked tool box to fit onto my front hitch when towing the trailer. In that box I carry just about all the tools I use at home.
When I need a tool at home or on the road, I know it's in that box.
It weighs about 200 pounds loaded, so I use that weight to eliminate the need for weight-transfer bars. I had previously used such bars to transfer about that much weight to the front axle to compensate for the trailer's hitch weight.
Works for me.