I ran my 14' widebody hyside down pine creek and numbers on Sunday. It is still a fun level, but be ready, especially on the fractions, for a lot of rock dodging, spinning off rocks, hitting rocks and getting stuck. It is still a lot of fun, as long as you know whats coming.
As far as doing Fractions, the BV town run and Brown's canyon in a single day - that sounds like a really long day at this flow. Brown's is 13 miles, Fractions is 7 miles and the BV Town run is 6. Our 7-8 mile run (we put in at Clear Creek of the Ark) on Pine/Numbers took about 4 hours including lunch and a brief scout at pine creek (but excluding shuttles and rigging). Of course we had more gradient to keep everything moving than you will. For 26 miles, at this level I would guess that will take you 8 or more hours. So either get an real early start or consider starting lower, either at the start of the town run or at the start of Brown's canyon. A lot of outfitters run Brown's as a full day trip...