Denbigh is conveniently placed for access to major cities, with Bangor, Manchester and Liverpool approx an hour away, and the nearest train station at Rhyl - 20 mins by car, or 40 mins by bus.
For future, longer events (2019), there are also international airports at Manchester and Liverpool for those who want to come from afar.
From London it's possible to get an ADVANCE direct Virgin train from London Euston to Rhyl in 2hrs 35, for as little as £23, but you have to pick wisely. Average prices, on the day, are much more (£45-90), and you don't want to consider peak fares. Prebooking will also get you power sockets and a table.
There are supermarkets (Lidl, Aldi, Morrisons, Co-Op), hardware stores (Jewson, Travis Perkins, Townsend) and general home goods shops (Home Bargains). There is a bike shop for last minute repairs and spares.
The race base is at Open Door Adventure in Bont Newydd, just outside Denbigh itself.