Just prepare well. Read multiple descriptions of the trail online or in books. Print out pics of trail junctions where a change in trail path is indicated and take these with you. Look ahead for trail blazes every 5 yards or so, and look behind you to see if blazes are on the trees as you would return. I like to implant in my head what the return scene looks like also. You can always back-track a bit to where you see the trail blaze and then reassess where the trail goes. Better than taking off in the wrong direction for 30 yards.