So you're on your way! When you reach your trailhead, be sure to check in with the Ranger and get an update on hazards. Also find out if there are trail crews working along your route -- it's nice to know where help might be found if you need it.
You should have reviewed the day's hike before heading out, but also try to stay together. One map-aware hiker can take the lead, and one or two should consciously be last so that no one falls behind (we call them "sweeps" like in this photo). The faster hikers always stop at trail merges until the others catch up -- we started doing that when half the group went 2-3 miles in the wrong direction and it ruined everyone's day.
The "Leave No Trace" rule applies in all wilderness areas (and wouldn't it be nice if it applied around the city, too!) Follow park rules, carry out everything you've carried in, camp at least 100' from any water and do your best to make your campsite look natural and pristine before you leave. All potty holes should be 5-8" deep and covered with soil and a rock. Carry your used t.p. in a little ziploc to discard at home.
There are just a few real chores when on the trail: filtering water, cooking, and cleaning up. FLABs generally pair up for each day's chore, rotating chores and partners daily. Anyone not working looks around for ways to help before she takes a swim or reads her book.
After a day's hike, we enjoy relaxing by the river or lake for a while before starting dinner. Here we are playing a dice game near camp.