I fish alot of places like that when I have time to kill some days, and one of the techniques I have been using and having success with is simply throwing a green pumpkin 4" grub on a 3/16 head, 6-8lb test especially if the water is clear.
I would imagine that the bass are lacking in forage, but this time of year, their should be alot of small baitfish in the pond, if bluegill from last year they are a few inches.....I always figure everyone who is bass fishing is throwing the most popular baits, and bass do get conditioned to the same look.
If bass will not hit a small grub on a jighead, either hopped on bottom, swim it at various depths, but I usually find if you just parallel the break lines of the first drop off, try to get away from the crowds, you can often catch fish. I believe lighter line is actually the key, same with smaller baits that are less intrusive. Very few people in lakes with Largemouth will break out a curly tail grub in 3-4 inches...You can rig it on a Mushroom head, darter head, ballhead, light texas rig....It will match all forage that could potentially be in the pond..
Another option is to break out the light action spinning rod, and downsize to the tiny trap size, 2" rapala, bitsy tubes, crappie baits. If you can't get bit in half hour, move to a different pond. Or go at night. I prefer night fishing on most lakes that get pressure. I get bigger fish at night and can often catch them on topwater which makes it that much better.
Hope that helps. I pond hop often and have become much more finesse, lighter line since Pond Bass seem to be in tune with forage, so big baits often get passed up. 4-6 feet is crystal clear water to me, so I would downsize and trust your drag.....