Probably too early to predict the Owyhee, there is possibility for a snowy late Winter and the basin is sitting above average (average does include some very lean years). The only time we ran the Lower Owyhee was early July when in lieu of a MF that was too high for our TLs comfort we headed S and ran the Bruneau and Owyhee instead. Anything is possible if not probable.
As said above the Main Salmon could be huge in early June....then again it could be fine. That time of year is so variable and impossible to call so far out, even a weak snowpack can come off really quickly and give a short but big spike. Make plans by all means but be prepared to change horses on the fly as conditions dictate.
I'd be thinking and plotting all of this myself at this time of year but as we will be on the Grand in early June.. ho hum