Jim is correct here - err on the side of caution, its only a fish after all!
Unless you are EXPERT in the SPECIFIC area you are wading, the WB above 1000 can be tough to wade. I bought one of the CO2 inflatable belt pack PFDs for when I am wading alone anywhere; I slipped on a flat rock in knee deep water when the WB was 700 this May, dropped like a rock before I knew what was happening, almost broke a finger and could have easily sprained/broken an ankle, kneecap, etc.
On any river in waist deep water you can easily get swept away with even mild current - people forget about the bouyancy force that greatly reduces the traction your feet have on the river bottom. Water weighs >64 lbs per cubic ft, a grown man is easily displacing ~100 lbs of upward bouyancy when he is in over his waist [some more than others . . .]
The WB is almost all rocks; I would want carbide cleats on my feet above 900 fps in addition to the inflatable.
Also remember that the flow rate is NOT the water level, going from 500 - 1000 cfs does NOT mean the water is twice as high. A small increase in water level makes a large increase in current flow speed [water runs downhill, remember?]
Study the online Hale Eddy gage height [ft] vs. flow rate [cfs] and you will see that the current is what you are facing when wading at 1000, not the depth necessarily. Just because it is still thigh high does not mean it is safe, the current can wipe you right out if it is fast enough. Every spot on the river is different, you need to be sure of your specific area before going in.
Also please remember that cold rivers are especially dangerous - easy to get hypothermic in 56 deg. water.
Not trying to scare anyone off, just use caution and common sense. There is still 1 body missing in the WB and that is enough.