My most important things are:
- Proper clothing, to me the most important thing
- Sports tape to support a busted angle, so you can walk out
- Headlight in case you get caught in the dark
- Bivvybag incase you need to stay in place.
- Maps/compass so you don't get lost.

Being from Europe, the wildernes is never really that. Lost of markings and there always seems to be something manmade as a reference point somewhere.