The Challenge starts at 06.00hrs in the morning so you may want to arrive on Saturday and be closer to the start area. There are a few options available:
Be aware that the Challenge will start on time – if you’re not there, don’t worry you’ll have what’s left of 15 hours to catch up but your official time starts with the hooter.
The nearest train station is Herne Bay. There is NO BUS SERVICE to Marshside!
There are several B & Bs & guest houses in Herne Bay (which is only 10 minutes from the start) and it may be worth trying those.