Sounds like this body of water is GOLD. Eels, Shiners. That is plenty. Eels would be my primary focus since that is what Bass will prefer if they are lucky enough to find one they can catch. Eels represent almost everything lures are based after, long, Thin, slimy, and provide a ton of nutrients, easy to swallow, and a 9-12" Eel is something a Big Bass will chase, since Eels rarely leave areas where they can be prey. Eels in ponds/lakes can live in areas where Bass do not want to be from PH, O2, Shallow, Heat etc. Eels are often buried in mud or slime and if a bass spots one, that is a tough bait to catch, but present an injured Eel, or Disoriented one, and Big Bass will respond.
Eels are a favorite for Striped Bass and I used to wonder if Saltwater Stripers on Long Island in 80 feet of water ever see Eels, but that was almost always a sure thing. I have also used Eels in Freshwater with success in NY and here in Florida, and I usually like to drag a Gulp Eel (It works better for me than any Savage gear etc.) but a Sluggo is another good option, and you can punch a Senko or Long Straight Worm on lighter weights which is easier (at least for me, 1.5 oz is not easy to learn) but a 6" Senko, or 5" Gambler Fat Ace will slide through most cover with only 3/8-1/2, maybe a 1/4. Or Fish the Sluggo like a fluke, same with a senko, but you should always drag a soft bait on bottom while fishing a new lake in a rod holder to locate spots while you are concentrating on cover. I usually drop a 10" Power Worm in a rod holder every time I fish, sometimes I will use a Creature or a Fluke, and if you want a bait to float, pick up some cheap walleye slip floats and color them any color you want and then peg them to the worm and it becomes a floater. Or just stick one in a tube and drag that on a C-rig/Mojo Rig, I like a Mono Leader in clear color, something abrasion resistant, in 12-17lb test when dragging bottom, and if weeds, 2-3' leader but you can usually just eyeball a leader that is good enough 14-20" about my standard, 1/2 oz bullet weight, brass and glass for stained water or hard bottoms, but I usually just use a cheap bead and lightest weight I can to keep the bait on bottom, drag not too tight or loose, but make sure it is Secure.
In that pond. Drag one bait only. A GULP EEL, the big ones, 9" I think they are, they work great especially at night but you can fish them like any other worm. I like the black color but prefer the brown one with silver sides, they sell a pint for about $10 online, and that is money well spent, I have used the savage Eels etc. They are always on clearance here in florida, I like their creative colors, but at the end of the day, Berkley Gulp is the next best thing to live bait if imitating an Eel.
I like this pond. I hope I find one like this on my next Google earth outing. Good luck. I would be confident that you have Huge Bass in that lake, Shiners and Eels, that can make fishing tough, too much forage can make artificial lures harder, that is when I focus on Soft baits and stealth. Find the springs in summer and you will catch fish, if you are not catching, before changing lures, try a few retreives super fast, sometimes that works in summer. Not sure why, but sometimes burning a bait in mid summer will generate strikes when you are getting shut out.
Good Luck. I love finding new places to fish, figuring out new water is what makes fishing so d**n addicting. I still have not figured it out, but one slam dunk tip is to look up in the trees for any Big Birds that feed on bait, I call them Loons, but if a pond has birds that feed, then you can be certain they will sit on a tree that is over a spot where bait washes up. Turtles also mean wood usually, and when all else fails, break out your 6lb test, put on a tiny split shot, and a tiny bait like a 2" grub.