I've seen that table on B. Goat's post a couple years ago and always compared it to levels I've seen when hiking the 'box'. After running it w/ 880 on Smith gauge and Spider's 5-550, after the conversion the same rule-of-thumb on the Smith seems to apply to Belt. After conversion 250 is floatable w/ some dragging. Less than that could be a little more work. This is all IMHO of a raft run. Kayak and small cat may still make it easy.
Definitely going to be tubing it in the next few weeks though.
"If you're gonna be a hero, you have to do stupid things once and awhile."