Jim, with all due respect, if the signal can be heard, it can be found. It is the element of warfare that the US has no equal.Is this armchair quarterbacking by someone who hasn't been in the field?
You THINK you can locate it, until you're down to the last several miles (could be as little as 5 miles) ... and bearings change (skywave overtakes groundwave - ever heard that concept?) And this is practicing on cooperative 'targets' that continuously transmit, not a rabbit that takes breaks and obsersves silent periods.
Methinks all your time might have been spent with line-of-sight VHF DFing, and that is easy (easier than HF).
By keeping transmission short and irregular, one can avoid precise location.
However, if your head is out of the hole very long, and it was decided to commit assets to you, you would be found.
Within an hour your neighborhood could be located. Authorities could then move mobile units to your neighborhood and have you within a couple of hours, MAX. With airborne assets it could be only several minutes....but only once those local, mobile assets are in place.