I would try to visit both when school is in session. In the summer he will see the buildings but won’t be able to get a great sense of the student body, vibe on campus etc.
Colgate is a LAC while Wake is a mid-sized university. Locations are also different. Does he have a preference?
I recommend ED only if ALL of the following are true:
–The applicant has one top choice college.
–That college appears affordable.
–The family has no need to compare financial offers among different colleges.