Coal in the quantities needed to rebuild a shattered civilization are not easily accessed unless you’re thinking of existing mines (which without maintenance would be inaccessible before we were done desperately trying to stay alive as a species). Hydropower and wind power both require advanced industry to work at any useful scale beyond the individual, and there would be no industry. Mind you, I’m ignoring the loss of knowledge, and just how people would remember to do these things, and I’m assuming a “best case” nuclear apocalypse.
I’d prefer that our fate as a species not rely on begging the question of industry and technology.
There is still crazy amounts of coal around WV very near the surface for example. Easily enough to bootstrap an industrial revolution multiple times. It's not a question of mining you can pick coal up from open top mines on the surface with your hands. You even see coal seams where they simply cut down to build roads a little.
We don't use it because the high sulfur content requires more expensive scrubbers to meet modern air quality standards. And due to the drop in solar / wind energy plus concerns about climate change it's likely to be available long term.
PS: US coal supply is estimated around 350 years at current production levels. Though that's also a low estimate based on proven reserves. Further, if you consider the Oxigen in the atmosphere needed to be separated from Carbon in the first place you should realize there is quite a bit of fossil fuels sitting around.
I’d prefer that our fate as a species not rely on begging the question of industry and technology.