bacdorslider - We went through something kind of similar with our younger son. For us parents, it was 'early' back in 2010...Fall of junior year, top-3 choice school asked for us to take unofficial visit, attend a football game, etc...
So we did. Offer didn't come right then and there, but shortly later. They did tell us on the visit that an offer was coming. So we spent the time, like you, figuring out what we wanted to do with that information.
I like the advice to lean on your son's travel org for advice and help. We leaned on both our and our son's HS coach who had sent a lot of players onto D1 and beyond.
They were fantastic help!! They contacted every school on our son's list and told them, 'the boy is probably getting an offer soon, while the parents prefer not to commit so soon, they may allow it because it is a school he's very interested in.'
Some schools sped up their process. Others said, 'we're not ready, can he just wait?' And others said, 'not interested.'
In addition, our son had multiple conversations with the HC of that school as well as the others that either sped up or asked to wait. I had some with the recruiting coach and eventually with several of the schools on subsequent resulting unofficial visits. I believe we were able to get as much as possible on the table to enable a higher probability of a good decision.
The point is, I believe using that process got us all the data we needed about 5 or 6 schools and where he stood with them. It helped him to make a decision and it helped us parents to feel comfortable with it (he committed a short while later to the first school).
Use the advice above. Lean on your resources (you said you are) and don't be afraid to ask any question you want to hear answers about. You do, in fact, have at least a little bit of control of this situation right now. Use it!! And good luck!!