Q: so i have been left under the impression that old wine making techniques were to simply smash berries and put the juice in a bottle. If I don't add yeast will it just be nasty fruit juice?
A: Berries will have wild yeast on them, and if you just smash them up and put them in a container that yeast will ferment them, and produce alcohol. That doesn't necessarily mean that the stuff produced will taste good. Most beer/wine brewers use specialized strains of yeast that have been carefully selected to produce certain flavors, and (more importantly) to not produce off flavors. Wild yeasts haven't undergone this selection process, so you have no idea what you'll ultimately wind up with. It could be awesome or it could be nasty. If you really want to make sure that you wind up with good-tasting wine, go to a homebrew store and pick up some wine yeast - dried packets only cost about $0.60 for enough yeast to ferment 5 gallons of juice. (Again, you could use bread yeast, but that's specialized to raise bread, not to produce alcohol. If you add bread yeast to your juice, you will get some alcohol, but it will taste nasty.)