I agree with Logan that you should be able to swim out of any river you are running. (Hopefully with all your gear.) No matter how easy, s*** happens.
That being said, the stretch from Big Bend to Salida is markedly easier than Salida to Rincon. Checked a mile-by-mile rafters guide (by Fampton) I have. This guide consistently rates the rapids a grade harder than what we kayakers consider them. It had no listed rapids in this section of any grade. I ran it several years ago @ 600 cfs in my raft and I don't remember anything of consequence except the lowhead dam for the fish hatchery. This is well marked and has a boat chute and portage river left. I would consider this slightly easier than Grizzly Creek to Glenwood on the Colorado.
As far as scenery, the BB to S runs through farm lands in the upper valley. That man is around is apparent throughout the run. However, there are great views of the surrounding 13,000 and 14,000 peaks. It also ends in Downtown Salida where you can get a good meal at one of the excellent restaurants. The run is ~6 miles long.
The TP to LP(TC) run is lower down in a canyon. It is roadside and has a more desert feel to it. This run is probably marginally more difficult than BB to S. (Think Grizzly Creek to Glenwood.) Nearest town of any size is Salida or Canon City. (Gas station at Cotapaxi.) TP to LP is ~3 miles, add ~ 2 miles to go on to Texas Creek, but check the axis there - it was closed in May of this year.
p.s. Not trying to contradict you Logan, just add information.