Don't read too much into it and get skeered. Croom is in it's best condition for riding during or after a rain. In the dry season climbs are long and sandy. In the wet season climbs are long and packed. There are a few lower sections that are best stayed off of because of slick clay and mud, but not that many and very easy to avoid - except the South side of Tucker Hill, but it doesn't last long.
Do plan on bringing enough water for your ride because the only place to refill is at the Tucker Hill restrooms area. Croom can be a tough one, but once you get used to it then it's pretty nice.
Never been there before and ride alone? Good chance you'll get lost and wander around for days. Okay, maybe a tad exaggerated, but you can easily get lost if you don't know your way around.
It's a cross country trail system with a few technical sections tossed in where possible; but you'll always find an easier/harder path.
Just hop on and enjoy the ride.