Similar to the Stave, I have a favourite piece of water that is heavily influenced by Fraser water height and over the years of fishing there in in different water conditions, and correlating that with the Fraser River gauge, I can pretty confidently predict water conditions and access before I leave the house.
Under x metres on the guage, the shoreline is very walkable and the water is too shallow to pontoon. Above x metres, there is enough water to boat but the shoreline is still walkable.
A little bit higher a y metres, it's still walkable but wading becomes sketchy, so a boat is definitely the way to move around.
I stop fishing at z metres. At that point it is so backed up and the water is out of the channel and well into the grass and trees. Fishing becomes a needle in a haystack exercise and so I wait until the water drops below z metres. Unfortunately this year it was above z metres for most of the summer! I'm glued to the guage for the better part of the spring and summer, and referring to the notes in my journal, in order to assess: do I go or don't I, do I need my boat or don't I, and would I feel safer with a wading partner
My unsolicited advise is to visit the Stave at all stages of the freshet, correlate your observations to the guage, and journal your observations. Over time you will be able to predict water height and access from your couch.