I've found Brown's practically deserted when I put in after about 3 pm. Launching then will still get you down to Hecla or Stone Bridge with plenty of daylight (unless you're stopping to play lots...). Speaking of playing, depending on the flow, Toilet Bowl is a perfect surf for a raft as well as Heckel and Jeckel Rock.
The Fractions is worth doing and a real kick, run left at Frog Rock to avoid the lethal sieve.
Maybe I'll see you on the river - I'll be rowing a blue Vanguard with yellow oars.
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse