In a 5-gallon sports cooler combine all ingredients except reserve some water. Stir or shake container to chill. If ice all melts add more. If too strong add water, but leave on the strong side because ice will continue to dilute over the next few hours. Makes about 2 1/2 gallons.
Just like Party Margarita recipe, you should serve with lime wedges, a saucer of kosher salt, and 6-oz plastic cups like airlines use. Lime the rim, touch the rim to the salt, drop the lime into the cup, and dispense.