The Suwannee is actually running relatively low. The gauge at White Springs (closest to Big Shoals) is showing only ~700cfs compared to historical median flow ~1900cfs and Gauge Height ~53.6'. Further down at Branford it's not quite as low. ~7000cfs compared to historical median of ~10000cfs. But both numbers are higher than in, say, June.
According to a local outfitter (Suwannee Canoe Outpost) . . .
52-56 feet: "Low-medium" to "medium" river conditions. Ideal for camping on beaches. Slow to medium current in most areas. Nice balance between camping, current, and scenery. All trips open, from the Swamp to the Gulf. Big Shoals probably too low to run at this level. (We recommend portaging Big Shoals anyway.)