A staff is essential IMO on rivers such.. Good luck on Ausable with out one..
The old standby stick in the woods gets , well lame when you just need it handy..
For Years and Years I have used a cheap 14.00 - 3 section hiking staff that collapses down to about 28-30' or so.. They have served me and clients well for the price.. Down side , they are still bulky in some way.. I hook mine with a carbiner to some body part..
Those foldastaff by others seem very sweet.. Fichy has a very nice one that I'm sure he will, did recommend..
If I had the coin Id go on his recommendation.. If you want to go easy for limited use, the $14.00 ones work fine too..