I encountered this issue while playing in the NJ Mid-Am this year at Somerset Hills on hole #9. There are a group of small/medium height evergreens and other varieties just up and to the left of the tee. I'm not sure if other trees were ever taken out of that area, but currently there are a bunch of out of place apple trees further up the left side that were recently planted on the dogleg short of the cross bunkers. These new trees however have absolutely zero effect on the longer player from the tee that hits it high enough to play down the first fairway. I think during normal member play the club discourages this strategy for saftey concerns, but during a match play event all restrictions were off.
The difference is huge for the player that can hit the ball into the first fairway as opposed to hitting to the normal 9th fairway, and then playing the hole from there. For myself it is the difference of hitting a Driver over into the 1st fairway and then maybe a 4-6 iron into the green as opposed to almost always having to play it as a 3 shot hole the normal route. It was interesting that the officials watching our semi final match saw my play from that tee down the first fairway, and before we reached that tee in the final match, someone had walked ahead and put the tee markers as far left and back as they possibly could to discourage that same play again. Much to their dismay, my opponent and I just teed it a bit higher and as far right as we could and bombed away to the same spot as before.
In stroke play qualifying for the Met Am a couple of years ago also held at Somerset Hills, they set up an internal out of bounds for the first fairway from the 9th tee for those rounds. I personally can't stand internal out of bounds...it's all the same course...you should be able to try and make a score from anywhere you wish.
Tom,
Where on the course did you have this issue at Gulph Mills? I can't recall any shortcuts that I may have missed.