Do not Lock your Hitch

I have done similar while towing and stopping to run the oil through trans at a rest stop. I missed putting tow vehicle back in neutral to tow. I shut my HHR off in drive(don't have to remove key). And went on about my way to a rest room. When returning to MH something told me to recheck tow vehicle. I did and sure enough it was left in drive by me. No one else to blame. Its a simple mistake, it happens. I learned that you never can be distracted while working with a towed vehicle. Just saying it can happen! Always have the backup camera aimed at the hitch and full pic of towed vehicle, believe me it helps Don't ask how I know?