Reflectors are a good idea. Its less than 2' off the bumper. I believe that is the local requirement for a red flag, like you see on lumber. I would consider taping the stake in place, with flagging on the top.
I have a roll of red/ white DOT reflective sticker stuff. A good idea.
I just had a job today that was three country road miles from me.
I thought it would be a convenient way to also carry a gas can outside of my SUV, if I were to go out of my service area, like to a friend's house in Portland. Then, I wouldn't have to put on my roof box or cargo platform for gas.
Any other thoughts on the legality of it? I have a cargo platform that I was going to use to put the AT on, then thought the AT looked like a 2" tube. My hitch has a standard sized hitch pin hole, and a small hitch pin hole closer to the opening. I was able to line up the closer, smaller hole on the hitch with the hole on the AT, locking it in place with a bolt and nut.