Coping with the children after a nasty divorce.....?

My husband and I divorced after almost 9 years of marriage and in that time, had the most wonderful two children who are now 5 and almost 3..they are very young. During our 9 years of marriage as well, I went through sparatic abuse of all forms including physical, traces of infidelity,extreme taboo (including and ..more than any) and one red handed count of molesting my older sister while she slept over for a visit (no charges were pressed). Needless to say he was twisted! I can seem to separate two things though...his relationship with the kids! He was....a WONDERFUL father who loved the kids..but his actions to me and his private time....tell me not so much. My kids(esp my son) look up to him. Now that we are divorcing....things change. I don't want to tear him outta the kids lives...but then again I want to protect them because I would be a fool to ume he is normal? My husband agreed to let me make a 1000 mile move if I brought the children home for visits according to school breaks....and so I did. I think the separation is good....it distances his ways and keeps the kids less prone to being around it so often and their chances low...but are still able to have a relationship. Before we agreed on separation, he started sleeping and seeing someone from a ad, and beat the crap outta me twice in front of my children. My views are pretty skewed on him, even his relationship with the kids. My move is made and I don't plan on uprooting my kids again...I just want life to go on! How do I handle the guilt of wondering how my children will turn out with their father far away and out of their lives.....or handle the moments of them missing their father???