I have also cooked Argentine skirt steak or brought empanadas. Se below for my favorite Argentine market in Los Angeles.
I also made homemade guacamole used as a topping for the tacos. I use fresh hass avocados for a nutty taste and reed avocados for a creamer taste. Fuerte avocados also are great for guacamole. Whenever possible it is best to purchase all fruit or veggies from a local farmers market.
To make my guacamole I used fresh ripe avocados, then added hot red spicy salsa, peppers, garlic, and ciliantro to my guacamole. I seasoned it with a little squeeze of lime. See below for my recomendations on where to purchase items for your next camping trip.
Amazing Chicken (pollo asada) or Carne Asada (for tacos), Salsa
Argentine steak and Empanadas (Alex Meat Market)
Cilantro, carrots and radish (La Canada Farmer's Market)