I Need recipe help, Fruit Juices to vend

I am vending at a large festival this weekend. One of the rules is I cannot sell soda or water. Juices are OK. Last year I did lemonade and ice tea. This year I am hopping to do more sales by adding more flavors.   The big thing around here is fruit juices  watermelon, lime, lemon, cantaloupe, ect. They are displayed in big pictures with ice and fruit pieces  and vended with a ladle. The question is how do you make them. I have looked around for a commercial  beverage base with no luck. My wife thinks that the fruit is pureed  and then mixed with water and sweetened with simple syrup to taste.  I do not have time to experiment,  so I am hopping that someone here has some advice.
 
Thanks in advance
 
Bill
 
 
 

Here are a couple of threads on Roadfood for lemonade (which would, of course, also work for limeade or orangeade):
 http://www.roadfood.com/Forums/Fresh-Squeezed-Lemonade-m582181.aspx
http://www.roadfood.com/Forums/m487969-print.aspx
 
Most of the commercially bottled juices use white grape juice or apple juice rather than simple syrup for their sweetening (so they can claim "no added sugar").  For that matter, you probably could vend the bottled juices that are available just as is, by adding some floating cut-up fruit for looks.  If you could handle the quantities involved, here is a website that sells fruit concentrates:
http://www.floridabulksales.com/inventor.htm

aguas frescas
mexgrocer.com

What about a nice ice cold apple juice or say Welsh's grape juice, can't get any simpler than that. Heck now I'm thirsty!

I guess I can understand banning sodas, but WATER?? What is THAT all about??

I'm sure they have the market cornered on soda and water and don't want any competition.