the cartoon was fun, but the OP's question is unanswered: how to deal with tall grass
as an idle engineer I have forever wanted to combine a PI detector with a weedeater,
many obvious problems
went on a (always ill advised) treasure hunt which evolved into a grueling 10 hour hike up a flowing river over 1' broken rocks, get to the spot which has 2' grass and I explained that it had to be cut
the 5 guys were going to leave until I coerced them to use their machetes, nothing there of course
cutting grass with a machete is a pain in the back
fire is nice with dry grass, but hardly discreet