Originally Posted by David in FL
I'd play a second ball under 3-3 and bring it to the committee.
Without a well defined OB, unless your ball was in the 6 fairway, I'd struggle to call it OB. While you know where the stakes have been in the past, fellow competitors may not.
I would do the same, and if there is no committee I would play it as no OB on the hole (very reluctantly).
We have a similar hole with OB stakes in the rough between the two holes. I know exactly where the stakes are (because I put them there) but many people would have a hard time knowing if it was a close call without the stakes.
The bigger problem would be figuring out what the rest of the field was doing on balls clearly in the other fairway. I honestly don't know what I would do and also don't know what the other guys in our game would do. If any other groups were nearby I would probably drive over and ask them how they wanted to play it.
My guess is that we would all take our best guess at whether it was in play or OB and anything on the borderline we would play as in bounds. I'm also almost 100% positive that if I played a ball that I thought was probably OB, even though I might technically be "legal", I would nonchalant the hole and blow the Hell out of playing it well out of subconscious guilt. Not much danger that my score on the hole would gain an advantage over anybody.