I don't recommend using the vault, just the gamma seal lid on a bucket as shown below (with harness). The vault is a bit too flimsy, and the bucket is the perfect height for sitting on. We also have a short bucket. I go by 25 uses on the 5 gal bucket, and 18 in the short bucket. More if you can do something else with the paper (such as burn or have Mafia control over).
This is allowed in Idaho (I've taken on Main and Lower Salmon), but I know the gamma seal lid Groovers aren't allowed where parks rules apply, some places in Utah and the Grand for example.
I am a river, babe - I've got plenty of time, I don't know where I'm going, I'm just following the lines..... - "We are water" by Shaye