I can appreciate the convenience of lightweight wading staffs (staves?) but I would suggest you also consider the security that can be provided by a heavily-weighted staff. Combined with a suitable retractor (hammerhead) the staff can be kept completely out of the way of the line and yet remains close at hand. In the UK Sharpes supply such a staff. A rubber button is essential with this design.
Falkus explains the rationale better than I can in his book "Salmon Fishing".