Instead of drilling a shallow well, a small forage pond might be a better option.

You could dig a deep pit in one of your lowest spots at the same time you have excavation equipment on location for your big pond. That would be a very small incremental cost.

If you get the pit 5-10' below the summer groundwater level, then you could have a ready water source for the big pond when needed. Further, it is cheaper (initial cost & electricity) to use a small centrifugal pump when lifting water only a few in elevation compared to a submersible well pump.

Finally, if you size it right for your needs, then you could use it as a forage pond, grow-out pond, ornamental pond, etc.

In very wet years you could even put a trash pump in the little pond and move water on through your watershed if the groundwater elevation is starting to put some pressure on the liner of your big pond.

Just throwing out more ideas while you are still in the planning stages.

Good luck on your project!