We've been doing "Trunk or Treat" at our church for YEARS.... 12 at least. Last year was my first year actually participating (sorry, I don't have photos
). I have mixed feelings on "Trunk or Treat".... it's really great for doing something more in-depth... what I mean is that the concentration of kids is very high, so you can do something like my husband and I were going to do with the leprechuan this year (making a mini person from the both of us)... however, when it was determined that neither of us could go to the church party this year, we changed our plans because I didn't want to stand for HOURS with my arms wrapped around his back as I was hunched over. So... the car-to-car method is good for doing something a bit more elaborate like a "show". Last year, I had all the kids gather 'round my cauldron and I'd add things from my potion bottles, make them say the magic words, and pull out full-sized candybars. I didn't do that on Halloween because there are too large of gaps between kids and I think most kids just want to get their candy and press onward door-to-door.
On the other hand... I have 5 fingers. I mean... I didn't like the kids going trunk-to-trunk because of the higher volumes of kids and the fact that they'd keep going 'round and 'round and you couldn't tell which kid had already gotten candy from you. (We were going to stamp hands this year to prevent that.) More kids = more candy you have to have to give out... so... it can get very costly unless you buy the cheap candy.
... I like the traditional door-to-door ToTing the best. People usually give out better candy because they buy "the good stuff" so they can eat the leftovers. Not to mention, if a neighborhood doesn't get a lot of ToT'ers they're more inclined to pass out more candy... it's... AWESOME.
Based on my ToT experiences growing up whether it was going to the mall or the Trunk-or-treat or door-to-door... I came home more "loaded" with GOOD goodies when I went door-to-door.