Advice? I'm honestly not sure what to do

My husband is ALWAYS saying I am a helicopter parent. But, honestly I'm laid back compared to him.

My husband would happily wrap our son in bubble wrap. Of course, I'm still concerned about our son's safety, it's first priority. I try and prevent injury and if he gets hurt, I make sure he is ok and comfort him.

One example is we took our son to this really great farm to play on their playground and do a hay ride. They have these tractors as pictured below. I was going very slow and holding him. Hubby was just so scared he was going to fall or that I would drop him. I'm not trying to say he shouldn't be cautious but, I don't want my son to be scared to do things and explore within reason.

How do I approach this with hubby?