I see nothing wrong with it as long as you have permission from the land owner.
It sure would make it easier to detect. Weed whacker? I'd drag my lawn mower
out there and really give it a hair cut..

I have one of those cheap Wally World
$99 lawnmowers that I drag up to Oklahoma to cut my weeds up there. I take
the handle off and it all fits in the trunk of my car no problem. It's pretty light too
being as it's just a plane jane 20 inch deck with power nothing, and a B&S engine.
You would be surprised at the tall weeds and brush that I go through with that thing,
while whacking logs and rocks at the same time..

But it keeps on ticking.. I got a cedar limb jammed in it one day, and when I
got it unstuck and restarted, it was making a knocking sound, and I thought I
had whacked it out.. But it was just a loose blade. Tightened it back up and all
was well.
It's going on it's fourth year of abuse and still starts on the first pull every time.
You could mow a few strips, detect, mow a few more, detect, etc..

It will get the weeds down a lot lower than most other tools, and the noise will
run the snakes off..

A shot of it resting after a mow session here at the house the other day..
It's been a pretty good mower for a C note..