My husband met the coach on my son's visit, and I talked to him by phone one time during recruiting. After that, I met him (with my son) after the first series I attended, said hello, we chatted for about 2 minutes. Probably he saw us at subsequent games. I feel I could contact him if necessary; that, to me, is the main thing.
Parents on college parent facebook groups are something else. They usually ask questions about things that their kids should be taking care of by asking other students. I did/do not check my son's email account, although I do tell him to check at times when I know important emails might be coming. He has missed a few. The main thing is, make sure he gives you access to the bursar account, so you can see what is being charged, because that IS your business.