Most gate openers are just secured with lynch pins on the actuator. Easily removed and the gate just swings open.That is a lot to consider. I was thinking that a remote like a garage door opener would work. However, the camera and other options would be nice. It needs to be solar. Quiet is will be preferred by the neighbor that lives by my entrance. We live on a rural road without many neighbors. Most neighbors within a mile are great folks, but there have been some thieves around. A friend told me that a thief cut the arms off of their gate opener.
Our gun club put a gate opener with a key pad for members in a few years back. After getting installed and patting himself on the back about how secure it was, I pulled the pin and opened the gate. It now has more secure pins in place.