The couple of Libertyseeds that I've helped with already had a fixed amount of time to do a presentation because we were guest speakers at a host organization's event. That helped determine how much content we covered. If you're hosting an event, then that'll be your call. Figure out how much time & attention your guests will be interested in giving.
The 3 strikes are a good option if your audience has a lot of interest and attention. They're well structured, but doing all three strikes back to back can take over an hour and might be too much for some audiences. The first strike can be a nice substitute instead of doing all three, since it has a good introduction and ending, plus a good emotional punch with Lexington.
I would say that it's always a good thing to introduce Appleseed & pitch an Appleseed clinic to the audience. Having a table set-up on the side with targets, shirts, a demo rifle (or some real ones if that's appropriate to the venue), tri-folds and business cards is nice for people who are interested to look at some of the stuff. Have a stack of Redcoat & AQT targets to give away & let people take a few home with them.