here in this neck of the woods we have alot of HOA ponds that are teaming with fish . most of them are ketch and release and it is often difficult to get permission to visit them but that might be an idea.
the next spots i would explore if i were you are the "difficult" spots the general public avoid . some of the toughest spots to get to have good numbers of fish in them .
and there is also the ole right in front of your eyes spots that people think dont hold fish as well . some tiny water places have been very kind to me over the years . those little bitty shallow creeks often have good numbers of fish in the deeper pockets of water .
and last but not least , duck ponds ....some duck ponds are flat full of fat fish that sit under the ducks eating the crumbs .