UCDavis is a great school, and is at the bottom of the BigWest, however they are recruiting as high a level D1 player they can find. Infielddad knows as much about the program as any since his son coached there. I would not waste too much time considering them from a baseball, perspective.
His target schools should be based on what major he is interested in, what you describe could be a number of the Maryland area schools, Washington College leading the pack. Fenwaysouth and some others could direct you in this regard.
What you will find in the West is that, other than the programs mentioned to you most of the high academic schools tend to be D1's, and in general science and engineering majors that have labs are not compatible with D1 ball. (there are exceptions, Ivy's, Stanford, etc)
You will find that he should get in the range of 50% academic money from many of the smaller D3's depending on the school. The other thing that he needs to consider in choosing a school is it's size, a UCLA or Davis is completely different experience than CMS as an example.
Good luck.