I've moved several times -- and it doesn't work! The problem is that no matter where you go, your brain goes with you!
I try to disengage with my relatives as much as possible -- the main method being not to answer the phone, take forever to call back, and generally don't jump when they say "boo" -- and when they invite me to something, e.g., a holiday, tell them I already got an invite from someone else.
Good luck!
T