I was hoping you had some advice.
I'd dig everything under a Nickel ( may miss BIG gold tho) , or dig everything above Iron.
Oh Smallest Coil you got , either machine will work.
Yesterday I came across a Dream site , a place being cleared , with 3 Historical Civil War markers with in ' a Center fielders throw ' form the Site.
89 o 89% Humidity & Trash Everywhere ( homes were there , until 2002 ?? , Then the site was allowed to Grow new trees up to 20 feet tall & Ivy took over , meanwhile Homeless used the empty houses to live in , also camped in the area , they loved their Wine, 40's , Bud Light , etc all with aluminum screw caps + Steel beer caps (that sound good )
Oh homes were demoed with everything still in them.
I think they just started clearing , the Leaves on the downed trees were not even wilted yet.
Guess Ill go back when the trees are gone (With small coil) Every body & their buddy's will likely be Civil War hunting this site.. It was a nightmare . If it was Winter it would be 99% easier but still a pain.
Then on the way home (3 pm ) saw another large clearing area , near historic Downtown ( not Atlanta) but was Crack Town through the 1980's -2012. Still trees everywhere there as well, & the trash was worse than the first site, I eyeballed 20 'beavertail's' or more Can;s everywhere, 'I hardly could find a spot to ground balance

....Oh did I mention the Heat & Humidity , I'm sure you know that well being in LA.
This site will also be Swarmed by the Locals , Mucho Relics found within a Quarter Mile of this place.
Just all the Trash




, I'd put $ that there is relics at both sites & silver at the 2 ed ; as the homes dated to the 1940-1950's .
I will wait for all the Trees to be gone from here as well & use the little Loop, 'Night Time might work?.
These sites are VERY visible & as I stated will be Swarmed 'I'd give both sites a week or 2 before 'Signs' go up.
These places sound like the type you are asking about , so IMO Small Coil , Patience & A-lot , and Good luck. will help.
Sorry for my long post as usual, but wanted to get my Depression , Frustration across.
GL Buddy.