At those temps (60's) I'd be looking shallow (<10ft deep) ... around wood cover along the banks, pockets of emerging weeds (if they're growing in your lake), & sandy or pea gravel banks.
I'd be casting a 1/16oz marabou Roadrunner "around" the wood, and "over" the weeds or sand/gravel. If no takers, then I'd be casting a jig/plastic offering "into" the wood cover. Of course, I'd be using a weedless jighead, so I could get the thing into and back out of brush or tree limbs without hanging up on every cast. I use the 1.5" Panfish Assassins, various brands of solid body tubes and 2" stinger shad style plastics.
I'm using 6# test Vicious Panfish copolymer hi-vis line on a 6'6" fast action rod and on a 6' med action rod ... and 10/2 braid on a m/h rod. These are my primary "casting" rods.

When using jig/plastics, I cast out, lift the rod to about the 10 o:clock position, and start slowly reeling back in. The line is slightly bowed from rod tip to water, and I try and reel just fast enough to keep that bow in the line. Reason being, I'm watching the line (rather than waiting to feel the fish hit) ... watching for a slight single jump in the line, or for the line to go slack suddenly (knowing the jig couldn't be on bottom). Either case, I set the hook immediately upon seeing either of those cases. The single line jump is the fish coming up to the bait & inhaling it and not moving, whereas the slack line indicates the fish inhaled the bait but forward momentum caused the fish to continue to go past the point of where it inhaled the bait.

When casting a Roadrunner ... it's a simple cast & continuous retrieve deal. I cast & drop the rod down to a 7-8 o:clock position, and use a retrieve speed fast enough to keep the line straight. Bites are usually easy to detect, as you will likely feel the fish hit and start pulling back. But, that's not always the case ... sometimes it will feel like you have a big leaf on the lure, or it may feel like you're dragging the lure down a concrete sidewalk or gravel driveway, or it may just feel like the lure has gained a bunch of weight. I don't set the hook like I do when fishing jig/plastics (hard/fast) ... but, instead I keep reeling while at the same time sweeping the rod away from where the fish is. The distance of that sweep depends on the rod/line I'm using. If it's a stiff rod & braid ... about a 1ft sweep is sufficient. If it's one of my regular casting rods ... about a 2ft sweep may be necessary (due to the lighter action of the rods & stretch of the line).

I don't use double rigs for any method ... whether using jigs or live bait. And when I am using live bait, it's usually on a hook/sinker rig (& occasionally under a float). I don't use nibbles or minnows on my jigs. I just haven't seen the need for them, yet. But, I'm no artificial bait purist, either. If minnows or other live bait is the best game in town, then I play by the fish's rules !!

You can also try this method : Crappie Pappy Article ... should you find yourself faced with the types of cover/structure mentioned in the article.

Luck2ya .... and let us know how you do !!