SCG:
After having the "Shadowy St.Joe" as my home water, for 16 years, I've seen it in a lot of stages of bad run off, but this year seems to be one of its worst in a while.
If it's still running at a hair less then 7,000 (as of 07/02-per Eric's great link), as low down as Calder, I don't think the upper reaches,like "Tin Can Flats" up to "Red Ives", will even begin to get fishable to any degree until at least the very end of July-first of August.
If you can possibly re-arrange your trip, the best fishing, (strictly from my own fishing on the river and everyone's fishing is of course, different!), is the very end of August, on into September.