I have fished in Iceland for quite some time and know the fishing pretty well, my mother is from Iceland. For salmon rivers the costs during prime time which for most rivers is July and early August is quite high. The prices are less expensive in early June and later in August and Sept. but there are not as many fish or they are more concentrated in either the lower or upper part of the river. This could turn into a rather long post you can pm me and let me know what you are looking at spending, type of fishing, type of fish salmon or trout, etc. I can give you advice and possible contacts.