You should definitely reach out and see if the coach is available. I thought unofficials were a great way to meet the coach and learn about schools. Email the coach with your plans. If you don’t get a response, call and say when you will be visiting campus. See if a coach is around and can accommodate you. You may also want to let them know what meets you are attending as – you never know – they just may show up. Be prepared for meeting with the coach. Take your unofficial transcript and college CV with you. Also have your kid practice a 2 minute elevator speech about themselves and prepare 3 questions in advance.
One more thing. Some colleges value interest. Make sure to stop by the admissions office, even if the office is closed. Fill out the card that puts you on the mailing list. This often is used by AOs as evincing applicant interest, as many applicants never step foot on campus these days.