I need some advice please!!!!!!!!!!!!!!?

I recently contacted my dad and his family after not seeing or talking to them in 7 years. They all want me to come visit them soon but I'm so nervous and apprehensive about it. My mom and dad had a horrible divorce and my dads still very bitter and wont let it go. Plus they were mean to me when I was a kid, but I'm hoping time has changed them, they seem different but I'm scared that things might go wrong. My dad wants to bring up old bad memories and I've tried so hard to put them behind me. Any help or advice would be so helpful. I dont know what to do