I think that your son will do fine, but as someone said, keep in mind that for the most part pitchers and middle infieldders get first dibs. I am assuming that he will be getting exposure this summer, and do not limit it to instate only. And yes, reality sets in that there are so very many talented players, and that does without a doubt set up anxiety. It also gives one a sense of just how hard this journey really is and never take anything for granted.
I understand the anxiety, we all do, don't let anyone tell you different. In defense of those that have posted, we have been down the road, so take their advice in the spirit in which it is intended. You will not understand that until the dust settles. But understand that we do understand it can be a stressful time. The day son made a verbal commitment to Clemson was like a weight lifted and I was so glae it was OVER.
Most importanly make sure that you have targeted the schools that are a good fit, not just because they are schools he and you feel he should attend.
Now may be a great time to step back and try to ENJOY this time. Let your son take over things you have taken care of, as it is a great lesson in preparation for what is to come. I found that letting son take over the process helped him to understand time management, and if he didn't get in those questionares that was his problem not ours, Yes, definetly a group effort, but it's time for him to take over, you can be there to help guide him and give advice, but time to let him take ownership.
Best of luck, pm if you have any questions,