Leave no trace

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Across
  1. 4. "pack it in, pack it out" refers to ....?
  2. 5. keep the fire small and use only .....?
  3. 7. camp on .....? surfaces
  4. 8. carry and read this so you know where to go
  5. 9. Always walk on the ....? even if wet and muddy
  6. 10. Sat. phone, EPIRB, First Aid Kit, flares etc, are for an
  7. 12. keep sources of ...? clean by camping 100m away
  8. 14. leave rocks, plants and other ..... as you find them
  9. 15. pack plenty of this so you don't go hungry
  10. 16. keep it down so others can enjoy nature's sounds
  11. 17. never do this to wild animals or birds
  12. 18. do not do this to your rubbish
Down
  1. 1. make sure your fire burns down completely to this
  2. 2. another way of saying be nice to other hikers
  3. 3. a fungal disease that kills trees
  4. 6. do this to your food to minimise waste
  5. 11. carry extra ......? to protect you from extreme weather
  6. 12. observe from a distance and do not approach
  7. 13. carry this so you can dig a toileting hole
  8. 17. good campsites are ....? not made