Spud bar & gloves is my usual tools for this task. You can also use a RR Spike and a 4# mall to cut the asphalt into about an 8" square or circle...

I use the S6 and usually have no problems unitl about 2200-2640. I usually can get my 1/2 mile shots. However, In the past I have had problems with ...

It has been about 4 years since I have had to try this, but the data might still be available. Your situation is a little different than in my experi...