While all the give me's are ok, we have a drawer full of carp from welcome packets. I think some of the better things was a coupon from a local grocery store, it was for maybe only 10 bucks off but it was something. Same with a gas card, I think it was for around $50.00 and when gas was high this summer, it was a welcome item.
Think about including a sheet with turn in times, I know this sounds silly, but I know of one person who has a very difficult time with this. Also a list of how to get ahold of everybody should a need arise. If you are going to have a pancake breakfast or other type of breakfast add coupons for that. A list of participating teams is a good idea and where they are located.
I personally feel if something isn't going to be donated why put it in the welcome bag, as an organizer, I have a lot going on than worrying about shirts, hats and pins that all cost money.
Just my 2 pennies worth.