You dont have to switch ponds. You just needs to learn the patterns of the pond and figure out the ins and outs. That can be either the funnest thing to do or the most frustrating. The first thing I like to do is google the pond and see if you can find a map showing the layout of the pond (below is example of wordens pond). This will give you an idea where to start, but this process can take a lot of time and is best to periodically be done over the course of a year as the patterns change. However the patterns of one season will lead you to patterns of other seasons. Right now it being pre spawn you are looking for drop offs and ledges right off of flats. The reason being is that for the most part these fish are not going to be too far from where they will eventually spawn. In a few weeks you will see fish right on the bank where you can see them in plain sight. If you see a good amount of bass bedding it is fair to say that not too far from there is a place where they like to hunt which is usually a drop off, ledge or structure further off the bank. These will be key identifiers for places to fish pre spawn next year as well as post spawn which will be in a few weeks. Identifying where they are in the pattern is critical. To do this water temperature plays a big part. Deeper ponds and more northern ponds are still a bit colder than more shallow or southern ponds. Last Tuesday I fished the Pascoag Reservoir and it was 46 degrees in the water. On Saturday Wordens was 57 degrees. The northern part of RI had a harsher winter and wordens is much more shallow and in southern RI. Wordens will be spawning a couple of weeks before Pascoag starts to.
Now the fact there is no vegetation is not a big deal in fact it opens up the tackle box a bit more since weedless baits are not a necessity. You are just going to have to work the pond a bit more and look to identify flats where the fish will spawn and potential drop offs or structure where the fish may be hunting. Boulders are typically hot spots. This is purely trial and error. A couple of things can be done to help. The first is to download some type of fishing barometer on your phone. I like the fishing adviser which takes into account the weather, moon phase, etc. The reason being that there are a ton of things that affect the activity of fish. When testing new waters you need that feedback for when you are doing something right you are rewarded. Now its not a perfect science, but I'd take any help I can get. Nothing worse than doing everything right and still not catching fish. The least you can do is try to at least have a couple of factors in your favor.
The other thing I like to do is to have a few rods with a couple of styles of baits. The idea should be to entice fish at various levels of activity. Some baits that are meant to work quickly, one that is intermediate, and another that is worked very slowly. Hard and soft jerk baits are a go to (love the zoom fluke) because you can work them fast or slow. When it comes to colors, here in NE natural colors are always best to go to first. Greens and browns are key. Watermelon, green pumpkin are the go to and with some sunlight some red flake helps (watermelon red flake is a primo color in NE).
In an environment with rocks, boulders and sandy bottoms I would be looking to throw a hard jerk bait or a square bill crank bait and clack that thing against the rocks or bottom every chance I got. If that didt work I would look to rock a spider grub with a football jig head on it. Either way its all trial and error so its up to you to find what works for you. Good luck and tight lines..