As with most popular rivers/lakes , it is always best to go during the weekdays rather than a weekend . I believe the best fishin is between the 26mile bridge and the Rohdadendron(sp?)Parking .
Be careful of the gravel road though , my friend went there on the July 4 weekend , and had 2 flat tires ! , And he was driving a truck too . The tow truck guy said that during that weekend , he had already towed out 12+ cars due to flats . He recomends atleast a 10 Ply tire , 12-14 ply being ideal .
I have never been to the skagit , but hope to this summer . That is the bit of info i can pass along to you right now . Sorry it aint much .
Oh yeah , I remeber hearing that the water levels were a little too high last week , and that it will be better at the end of the month , depending on rain and snow pack melt .