You get Eulachon there too? We aren't allowed to catch them but sometimes get them from our native friends. Tasty fried
I've dipped for them at a couple different places. The Susitna River gets a run that is unbelievable. A 3-4' wide black line for miles running upriver. You could fill a boat in minutes. I don't care for them that much but I have some Asian friends that dig them. My kids like them cooked on a stick over the fire. I think we are allowed a 5 gallon bucket per person a day. I never need that many though.
We get them in the Nass and Skeena here but in March, looks like you are a fair bit later in the spring. I wish we were allowed to net our own here
They show up in late April/early May usually. It's a good time to fish for halibut from the beach down Cook inlet. Lot's of them caught in the shallows from shore near the south beach of Kasilof.