I will admit for a time, I hid from my family for years. And the reason why i state this is to hopefully help you with your situation.
Without going into details I will tell you that my life was pretty rough. With that came a bunch of trust issues... And I took it upon myself to hide everything... Including things that the average person would think didnt make much sense to hide.
The best thing you can do is let them be. From what youve stated, I can tell that they know you want to be a part of their life. For whatever reason they see you as a threat, even though you probably aren't. And it probably has little to do with you. But you will have a better chance of them coming around if you leave them alone. It may take a long time but there may come a day where they will really need you, and when they do, then you can begin the restoration process.
It took me years to sort out who in my life was an actual threat and why I needed to be left alone. And because of this I now have a great relationship with my father.
Just give them time and space. Sometimes all you can do is pray. I know its hard. But they will find you when they need you. 
