Hey Richie
Good luck, but... if i read correctly you haven't had contact with your mon and gran for 10 months. Seeing them may make you blub like a baby and may not feel like closure. Closure in 10 months after 18 years would be a frickin' miracle too.
I went through all sorts of plans when I left from knocking back all the wine at the memorial to turning up at an assembly in drag (looking fabulous but fierce). I have no regrets about not doing them.
But again, best of luck.