now blister prevention is some thing i know about, you need 2 pairs of socks, 1st thin cotton sports type 2nd thicker walking type, good boots well broken in are a must. predict when a blister is coming, if you get a hot spot or start to get sore STOP, there and then, tape up with surgical tape, dont be shy with it either. have some compede plasters for back up, they really do work very well if a little expensive. dry and wash feet every night and powder with talk, anti fungal is best, when walking round camp flip flops or crock type shoes are best, they allow the feet to air out dry out and allow your boots to dry out too..
if your boots get wet during the day pack them with news paper or those travel micro fibre towels over night, it will make all the difference the next day. also where possible use gaters in long grass and wet conditions, you look like a plank but they do help keep boots and feet much dryer....
hope this helps
chris.
ps did 186 miles in 5 day, 30 lb pack the other year, no blisters...
jobs a fish..