Its ideal for light to medium tackle setups, allowing for precise placement along undercut banks, near submerged structure, or over weed beds where predators lie in ambush
The Bull River is in great shape after lots of rain
A roll-top bag, on the other hand, can be opened/closed hundreds, if not thousands, of times without any major wear and tear
Other backpacks that are popular with Thru-hikers and would also work well for Philmont type treks: REI Trailmade 60 3 Lb 6 oz is pretty good, but the real winner is the price
For those of us with our stuff together and who not only know better but have many years on the river, lets add a trash bag to our fishing supplies and pick up stuff just on our way from the river to our vehicles