Ive caught tons of bass over the years with yellow pp and no leader.
This line is on all but one of my reels. (The one without yellow pp has 16 lb sniper fluoro, just for *** and giggles).
i always color the first 8 ft or so with a dark sharpie, and occasionally I'll tie on a leader, but this is just because I'm mental.
Hope this helps, and good luck.