Celticman,

You will have a blast at Grandfather. Sounds like you're going to be on McRowdy. You are right about the alcohol. But around the campsite its pretty much ignored. At least it was when I was there last (2000). I hope to go back soon. I was planning on going this year, but some thing came up and had to back out. The first year, I went by myself and didn't know anyone. I made friends and had a great time. If you don't mind cold showers, they are available all the time. And in the heat of the day, it can be a nice thing.
If you need some help getting around, look for a guy named Chuck. He's about 6'5" with short blonde hair and a goatee. He'll be there Wednesday night or Thursday morning. His group usually camps near the big fire ring, you can't miss it. And for a good veiw for MacRae Meadows, follow the trail to the top of McRowdy. Just do it sober.
Wish I was there.