Be aware that many star parties are held in remote locations where there are no bathroom facilities. Ask the party organizers what facilities are available and make your plans accordingly.

Be sure to bring some water with you and perhaps some light snacks. Being active late at night makes most people hungry. Even if you don't get hungry, you will certainly need something to drink, particularly on warm summer nights.

In most areas, you'll also want to carry some bug repellent. Many insects are most active at night, and in some locations, the mosquitoes can eat you alive!