I didn't think Adonis was a "wanderer" until I found out the hard way.
He's usually right up my butt. But one time, when I was replacing my back fence, he wandered to the street behind me
Another time, I was helping cousins clean out their flooded home after Katrina. Well, he followed me to the street, and I wasn't paying attention, he didn't follow me back to the house. I searched about 2 hours and so did both my cousins before he just "walked right back up". I was crying, knocking on doors, driving the neighborhood calling him. We all 3 think he was in someone's home. Was no way he doesn't come when called.
I do keep a collar on both with all their tags on them. When I walk them, we use harness.
I too, will have to leave mine with someone in early August for a trip to Austin. I feel much better knowing both have tags, and a microchip.
So both mine got a microchip this past 6 months.