In a large glass jar or camp growler, combine all ingredients except for lemon zest and fir tips and steep 8 to 12 hours at room temperature. Discard tea bags.
Fill glasses with ice. Wipe rim of each glass with lemon zest, then twist and squeeze zest and drop into glass. Pour or ladle punch into glasses and add a fir tip to each.
MAKE AHEAD: Complete step 1 and store chilled for up to 1 week.
*For exceptionally flavorful results, we like Steven Smith's Meadow chamomile blend ($15; smithtea.com).