Well, that is a tough situation...

On the antenna my first thought is a two element horizontal quad beam
pointed straight up.... The reflector will tend to shield the driven
from noise emanating from below... BUT, the noise being in the near
field all bets are off and you will just have to try...
You might also try a phasing noise reducer, like the MFJ 1025, etc...
Again, the noise being all around you may be impossible to reduce, but
then maybe not... Only a trial will tell...

You didn't mention the rig... Perhaps some DSP will help with reducing
noise... Also going to narrow modes like CW gasp, who does that
ancient mode? and PSK with narrow CRYSTAL filters will help...

In the end, you will likely have to team up with kindred souls and
establsih a remote radio station operated the internet as your
solution...

denny / k8do