A band wants to use an image to promote a US tour, does anyone have any experience with this kind of situation? My questions are really to to with copyright and $$. Should I charge them to use the image? Should I put a watermark on the image so that every time its reproduced (posters/flyers made by promoters etc) there is a credit. The bottom line is that its a good way to get work out there and I don't think they expect to pay.

Any advice/pointers would be much appreciated.