Day pack
water bottle
hat
sunscreen
a light-colored piece of light-weight fabric to sit on, at least 4'x6' (part of a full bedsheet works--inexpensive from thrift store);
close-focus binoculars and Kate's book, Secrets of the Oak Woodlands (both Emancan be purchased from Kate ahead of time from her website or at Emandal);
a pad of blank sheets for journaling and/or drawing;
writing implement(s) of your choice;
favorite field guides, if any;
comfortable closed-toe shoes with some tread for walking off-trail--ideally shoes that burs won't stick to.
Desirable but optional:
binoculars (8x42, 10x50ββor whatever you have, if any; Nikon Monarch 5's are a good, reasonably priced choice).