I think it was appropriate to hold a service at the memorial site the same hour, the same day. People do this all over the world for various reasons, occasions, and people. I believe it was polarizing to "ban" people from a service. Why not allow people to grieve or show their respect in a way that makes them comfortable?
Padilla appears to be a decent man, just as the Grunds appear to be fine folks. They were invested in searching for this child, the Grunds LOVED her and have a right to put closure on her death, as well as honor her as much as anyone else.
Frankly, I do not think the public spectacle created at a 5,000 person church would have been something I would have been comfortable attending, and had I lived closer, would have been inclined to go to a memorial NOT put on by this family. Clearly there were other people who felt the same way.
We should all be focused on Caylee and her memory, not on trashing or attacking others, especially on this day.