You might try your local library. I did that when I first got the bug for RVing and I read 2-3 pretty decent books. Unfortunately, I don't recall their titles but a search should turn up a few.
As for parks, try stateparks.com. It has a lot of good info not only on state parks around the country but oftentimes includes info on nearby RV parks, local tourist spots, etc.
Mike, Sue, Sissy and Little Man
2015 Ford F350 Lariat FX4 6.7 CC DRW
2015 Eagle Premier 351RSTS