Going down hill stick to the ruts, there is a very fine line between full noise and momentum.
General rule of thumb is low 2nd if going uphill with revs around 1800-2000
maybe lower if petrol. as ET says going down lock everything you have and select Low 1st
you can feather the brake if you feel you are going to quick , NEVER change gears or touch the clutch either going
up or down. If you dont feel comfortable about doing a track dont do it, take the easier track sometimes called the chicken track.
Avoid bog holes like the plague, it will only cause you pain. Make sure after any weekend away to clean your gear with hot soapy water,
allow to dry properly and pack it ready for your next trip. its all about momentum and wheel placement, going flat stick up a hill will only end in tears IMO
softly does it take your time and think it through.
Find yourself a nice hill or track you can practice on, in the dry and in the wet , then when you master that look for something a tad more technical.
Dont forget the chicken track is there for a reason