Congratulations! You did the right thing by attending. The Witnesses will look very bad in the eyes of non-JWs for not attending.
We're still waiting for a date for the funeral. It's a fair old drive to Doncaster so I'm planning on staying over. I'm going to suggest to my kids that they opt for a non-religious humanist funeral. If the JW siblings still won't attend then it will be obvious to all that DF'ing continues after death.