I use to stuff my fairly large backpack with as much as I could get in there. Over time I realized that maybe 1/2 of it wasn't being used, plus knowing your body of water can help eliminate a bunch of baits. I do carry 4 rigs, 3 baitcasters and 1 spinning rig.
One thing I still carry the most of is plastic's, mainly different sized worms, and in a few colors. Spinnerbaits were downsized to 4, 2 3/8, and 2 1/2 oz in shad pattern.
I carry no crankbaits due to the vegetation.
For terminal tackle, I still carry a good selection of hooks, but downsized the amount of bullet and dropshot weights. Being almost 73 with a not great back, the lower weight sure helps.
Again the key is to know the patterns of the bass where you fish, and only time on the water will help you to find out.