I haven't really seen it mentioned....but be honest. Tell them you initially hadn't considered a local college but you appreciate the opportunity and it was intriguing. Thank them for their time and tell them your going to give it a lot of thought but you not sure what direction your heading in. As someone else mentioned, you never know what contacts THAT coach has. Once you lose integrity, its all but impossible to get back. I would also inform the coach once you DID make a decision (and any coach you worked out for) and thank them even if you chose another school. NEVER know when that little bit of courtesy could help you out somewhere else down the road.