I usually get together with some friends in Berkeley for Thanksgiving, but this year I'm going out of town to my cousin's house, so in addition to the standard turkey etc., there will also be an assortment of Armenian sides and appetizers.

Almost 100% guaranteed to be there:
pilaf (absence of which would be a deliberate attempt to make me unhappy)
"penerlee" (i.e. peynirli börek: fried, cheese-filled pastry)
yalanchi sarma (stuffed grape leaves)
lavash (flatbread)
basterma (cured meat)
string cheese
turshi (pickled vegetables)