Pegleg WAS bone dry back in Feb/March/April but has been totally flooded for more than a month now. Minto Channeldid not dry up but was very low, and no flow through it at all. If the freshet has repeated what it did last year, then the channel immediately at the end of McSween will likely be impassible until mid August.
You should be able to figure out what it's like out there by looking at the website with the water level charts. Compare Mission and Hope for this year to the Mission and Hope readings for last year. I.E. whatever the Mission or Hope levels were for early August last year is what they need to get down to before venturing out to Peg. Mid August levels would be better.
FWIW