Planet Bike's combo taillight/reflectors are occasionally still available even after being officially discontinued. I see the Rack Blinky 5 and Grateful Red still available on a couple of sites.

I ride the local MUP at night several times a month -- technically it's not closed until after 10 pm. Occasionally I see walkers and joggers, since there are homes adjacent to some parts of the path.

I find it pretty easy to see at night with little light, especially on overcast nights when city lights are reflected off the cloud cover. I keep my headlight on low, aimed downward, and use my dimmest red taillight. Pretty much the same as the city bikes I see at night, which don't affect my dark adaptation. Occasionally I see others using lights that are unnecessarily bright for the MUP, but the main problem is aiming the lights directly forward into the eyes of oncoming cyclists and pedestrians.

There's only one long section under heavy tree cover, and I use brighter lights aimed ahead mostly because of the critters crossing the path -- lots of raccoons, possums, etc. I can quickly tip the light downward if I see other cyclists or pedestrians.