I've done it sucessfully.... The urge is to have long tripod exposures such as 30 seconds, but keep in mind each individual burst of light from the fireworks, over time in the same area, will blow out your highlights... I've found 8 second exposures pretty good... captures good highlights... depending on the pace of the fireworks, you may get a lot or 1-2 bursts... If you are good, have the tripod locked down, and shoot a good base shot, you can with photoshop easily use a blend mode and bring in certain bursts you really like for a series of shots to make a really cool effect... Also... aperture... 5.6-8.... at that distance, most everything will be in focus anyways... Cable release is a good idea but at this length of exposure, camera shake from the pressing of the shutter will be minimal at best, lastly, low iso... 100-200...