Good points made by many here. Regarding the # of scholly's not being public knowledge, that only makes sense. It is generally public knowledge that the allowable # at D1 is 11.7. It is less known that many schools are not fully funded. In most instances, it would come across as a negative for a coach to state publicly that his school has less than 11.7. It could be used against him by competing schools and viewed as a negative by prospective recruits.
To the OP's primary question, you said he liked the school, coaches and current players who were helping. If you can get in touch with one of those players, this can be a great source for those types of questions. Just be careful... any dialog is likely to get back to the coach. I don't think asking that question to current players is a problem at all, though. It shows you have genuine interest in the program.