Simple appetizer ideas for a summer BBQ?

I am having a BBQ this weekend and have a great meal with side dishes but need some munchies as we are starting the gathering at 2-3ish but won't have supper until 6:00 to 6:30ish. I need some munchie ideas besides chips that don't involve mayo or things like that as the food will be outside and the forecast calls for 28-32 degree weather. Thank you all!