I would move out of multonboro bay and on to the broads. Fish the west side of long island towards sandy island and across to welch island. We have been catching salmon anywhere from 10 to 25 feet this past week. I have been trolling between 1.8 and 2.0 latly and that has been working well for me. Orange is a good color right now and don't be afraid to troll a smelt or a shinner on a flat line that is still working form time to time especially early in the morning.
Don't feel bad. The Saturday before last I hooked 7 fish and brought in 3 Salmon and 1 Rainbow that were keepers - all in Moultonborough bay. This weekend, I only caught 1 little Salmon the entire time.