I say keep it simple, effective, less expensive and relatively vandal resistant:
1) Hole #
2) Distance
3) Line showing suggested fairway / basket location relative to tee.
4) Color coding for mutiple tees.
All the above can be done on a 4x4 post pretty easily. Router the numbers and line,
paint the post black, the hole # green, distance & line yellow - looks great. Black 4x4 is pretty tough to vandalize (unrewarding to sharpie and doesn't show much if done). Also easier to update/replace if course changes over time.
Seems to me that the nicer the signs are, the bigger an invitaion they are to idiots/vandals.
But if you
do decide to go with actual signs, why not use the additional space for something that's interesting (if not very useful):
"Net Elevation Change from Tee to Pin: -15 ft."
Pix of trees on the fairway are useless. My first time on any course, if I can't see the pin from the tee, I'm walking the fairway untill I spot it, regardless of what the tee sign shows - signs can't show you the window you need to hit.