Its been a few years since I was on the Navigator in Alaska but my memory of the salmon fishing excursion offered by Radisson is that they are very expensive. Not positive of the amount but it seems that it was about $200 pp for a half day of fishing. (I used to pay half of that to fish a WHOLE day out of Westport Washington) It might be better, if you have several from the group that want to fish, to arrange a private charter. Depending on the size of the group & the size of the fishing boat, you should be able to find a charter with a per person cost a lot less. One of the biggest salmon fishing ports is Ketchikan.

And with a private charter, if you can't or don't want to take your catch on board for dinner, they can usually arrange for it to be cleaned, cut, vacuuum packed, flash frozen, and shipped to your home. Not cheap tho.