Quote on best lens actually depends on your composition... 11-22 OR your kit lens is good enough if you are planning to shoot the fireworks from too close....... wide from a close distance will avoid unwanted lights getting reflected from lamp-post, compact flash, etc....
To comment on using wide from a very longer distance is not a bad idea as like I said it depends on your composition...And again its not wrong to have a small view of fireworks... with the surrounding area in picture you can actually judge the size of it....
Think & Plan properly before you shoot fireworks....go down, look at the location, do your home work on the settings that you plan, take some sample pictures a day before.... Last and most important, be there few hours early...