"Sand to Stone" and "Salt over Snow" trophies hint
To get the "Sand to Stone" trophy, in free ride, go from White Flats Camp to Pinwheels Ridge Camp without resorting to the chopper. To get the "Salt over Snow" trophy, in free ride, go from Tsunami Reef Camp to Redrock Bluffs Camp without resorting to the chopper. You must not teleport directly from one camp to another. However, you can teleport to a previous Vista Point/Livery and still get the trophy.