Did it solo last year, & in again for this year. It was amazing. The support for the solo runners is great.
Train for "time on your feet" rather than thinking "how far can I run". It's just tiring on your whole body being on the move for 24 hours. Do a lot of whole body core work.
I'm slow, but did quite well by not stopping at all.
Terrain was quite tricky at times, especially when tired in the dark....Lots of tree roots to trip over. You heard yells, then a thud in the distance, & you knew someone had tripped over yet another tree root!
It was dry last year. Suddenly dried up. But I guess if muddy it would be even harder....