Just following up. Thank you, everyone, for the helpful suggestions along the way. I had spoken with the guy who could dig a shallow well here and I believe that is always an option for the future. But I wanted to try for a deep well. I had the driller continue where he started. At about 240 feet, he found water in the 16 feet or so above bedrock. Not a ton of water but he imagines three gallons a minute or so, which is still several thousand gallons a day-- more than adequate.
Now I have to have the electric wiring to the old well located, and I will dig it up and hopefully find the water line in the same trench. I'll use my Bobcat to trench between the old line and the new well.
Been struggling with water issues here for two years. A reliable well would be an enormous asset and we appear to be the way!