If camping, be aware that some camp sites marked on the maps either no longer exist or are (really annoyingly) Caravan Club - caravans only, despite there being a tent symbol. We got caught out a couple of times at the end of a long day! It is not really the mapmakers fault as they are using OS map data which may not be current. On subsequent tours I have done a thorough web search for camp sites and marked them on the map myself.
Take plenty of good wet chain lube - if its rainy your chains will need regular attention, especially with the off-road bits.