Maninblack4612
Tour Winner
Done it myself plenty times. Walked to the vicinity of my first ball - had a very quick and cursory look at deep horrible gorse and said Nah! not going to bother. And walked to my provisional in the middle of the fairway. And that's all you need to do.
Which is why I think you should be able to play provisional for a ball which may be lost OR unplayable.