Determantion is great but you need knowledge.   Bump that rear-steer in Grave digger and you be eatin' grass and lookin at the sky through your own butt-hole.  I've even seen grave digger go rubber side up with a pro at the wheel.  Skill my friend, skill will get you there and back.  And when all else fail improvise.  I've busted snow drifts deeper than my hood was tall but just standing on the throttle won't get you anywhere but deeper (under certain circumstances).  I was muddin' once and hit a pit that had two sets of tracks.  I got cocky and took the middle, one rut from each side.  Big mistake, the center was solid.  I went from 25 to 0 in 6 inches.  Ended up finding two trees, jacking up the truck by the bumber (which was on the ground, solid center holding up truck with 4 tires hanging in mid air in the deep, deep ruts).  Shoving the trees under locking it in 4-low and holding it to the floor in reverse. One of the logs kicked up and ripped off a skid plate but I got out.  Everything's diffrent snow ain't mud and sand is it's own ball of wax.  But if your comfortable in your rig you can fare well in all of it.  Horsepower can get you there, but there can be 20 feet up a tree, over a cliff, under 10 feet of mud and water, or in a body cast.  Be careful have fun and never spit in front of women or children.