Do it, don't do it. It's completely up to you. All families are different. I have fond memories of getting dressed up, seeing friends dressed up, being excited to be out at night etc from when I was a child.
This was my DD's second time Trick or Treating, shes 5. We met up with a friend from school. The joy she had from that 90 minutes knocking on (decorated only) doors, seeing her friends, seeing all the different costumes and decorations, laughing at me when I couldn't figure out where I was in the new housing estate and the happiness on the faces of those answering the door is well worth it. There's a particular street near us that goes all out.
She wore last years costume and we put up last year's decorations, all of which were hand-me-downs. She didn't even ask to eat any of the sweets she had got. We usually grow our own ( small and a bit rubbish) pumpkins but I forgot this year to plant them!
The only thing that bothers me is people that don't do who feel the need to get on their high horse calling it allsorts of names. Its not begging and the " its soooooo amercanised" statements make my eyes roll. Just leave others to it.
(I'm not a fan of/ don't do Xmas eve boxes, baby showers, gender reveals, family pj's, refer to anything as making memorie etc, I'm sure theres others but o would never drag anyone down that chooses to do these things)