Anyone here fish cayuga? I've been there twice with nothing but pickerel. Any advice to catch a bass would be appreciated!

If you are fishing the northern end near Union Springs weeds and rocks are the main habitat. Jigs, big worms and senkos in the weeds work. In the mornings, frogs over matted vegetation gets bites but mostly from pike. Also I always really liked heading north to the railroad tracks. Jerkbaits and topwaters parallel to the riprap bank is a great smallie pattern. If you do a google earth search you can find some coves along the eastern side of the lake along with boat docks. Those hold plenty of largemouths. One final little tip, try going under the railroad tracks into the northern most part of Cayuga. Plenty of smallmouths to be had there. 

I feel like the pickeral are taking over that lake for sure.  I only get out there maybe once a year but it's been 25 pickeral to 1 bass for the past couple years...for me anyway.

If you're only catching pickerel, you're fishing way too shallow on that lake.  On a good day, jigs on the outside of submerged weed lines prevalent on both sides, mid lake, is a good tactic.  On a slow, same places, but dead stick an unweighted senko.  Midday, in sun, Take that senko, and Texas rig it with a pegged 1/16 oz. bullet weight.  Fling it near docks.

After watching a video of the BASS pros fishing Cayuga last year I can agree with you RichF. But it also has to do with pike and pickerel being the apex predators of the lake. Especially in the weedy areas. I know that the lake I fish here in PA has pickerel and they are far more aggressive than the bass. I've even had the same pickerel bite on my lure 3 x's in the same cast. That's why I'm encouraging my friends who fish there to take out as many legal size pickerel as they can. Just to cull the herd.