Starting an FLL team

I've mentored my fair share of FLL teams in the past, however this fall I'm going to start a new team at one of the local elementary schools.

Does anyone have any tips on how to run the team? I'll be working with 4th and 5th graders, and there'll be a few adults helping as well, though I'm the only one with FLL experience.

They need to learn all the software, building designs, etc.

What time should we start meeting? (How early in the season?)

Thanks a bunch!