When my wife and I went to Europe in 2013, it was very hot and we drank quite a few of the radlers (same idea, different name) that were either premade that way (a bottle or can) or mixed at the tavern. There were lime versions, lemon, orange, grapefruit, etc. and they all tasted pretty good because they were cold and it was so hot outside. When we got home, we decided to try to make some by mixing some Stiegl Goldbrau with 7-UP, lemonade, a mixture of both, Squirt, etc. and we could never get it quite right. If I were to make one, I wouldn't mix it all together as a part of the beer... instead I'd make a blonde ale or gold lager and try to mix it in the glass. The huckleberry version would just be considered a 'fruit beer', right? Brewing with fruit can be tricky because the sugars from the fruit are going to kick up a secondary fermentation which can really dry out the beer. Not for the squeamish.