This is definitely a great thread for those who have never done the SS thing before like me.
Some people do not realize that artists are doing something that they love for other people. They are not machines to take advantage of with 10+ sketches and 50 signatures. That's just unrealistic. If they are there all weekend, then don't hit them all at once. You can always go back later.
I was in line to get a sketch and signature from Finch at last year's Baltimore con. You know, one signature and one head sketch. Done. There was s couple people in line with huge stacks of, I would have to guess, everything that Finch had ever done to be signed. That's just not right, to the artist expecting him to sign every book and to the people behind you who have been waiting a long time. If you've ever been in a line to get anything from him, you know how long the lines usually are. I jumped in line around lunch time when it was not so bad.
Here's a tip that I used last year. If you're next up to get something done and you see a little kid who has been waiting in line for a long time, let him go ahead of you. The kid and parent will be very appreciative and the artist will see that you're a nice guy. Artists love doing things for kids so its always a nice break for them.