Sure you could film it with static cameras by yourself, but to make the most of the opportunity might be a good idea to recruit a small crew and really make an impression on the band.....
what if they are seeing what you can do... with some bands you might only get on shot to show them something that could lead to other things... i guess its what your after doing a professional piece or just having a good time
i have gotten to the point where i don't want anything less than stellar.. and the one man band just doesn't cut it for live events.. no matter how good you are its just boring with static cams and only one moving... and extra shooters aren't that difficult to obtain