This spring or summer, I am going on my first real fly fishing trip. Here's how it will be:
No guide
No hatch dates
We dont even know where on the river to fish
We dont know when the fish will spawn
Only one fly rod for 4 of us (looks like they are stuck with a worm on a spinning rod)
I dont know what fly to use.

So, first of all, what time frame can I expect salmon and/or trout to be there. This river is in Northern New Hampshire(swift river)

And what is a good general fly to start with If i have no idea what is hatching?

I know i should get a guide, But i have a sense of adventure, and am willing to try.