Ideas for a Family Reunion?

I am looking for ideas for a family reunion. This will be the first reunion we have had in over twenty years. The age range will be mostly from twenty to seventy years old with a few younger ones attending. I am looking for some clever ideas on simple decorations and door prizes.

We are asking everyone to bring a covered dish for the food and a couple of us will furnish the meat and table service. But we don't want anyone to feel obligated to spend a bunch of money. We were thinking asking everyone who wants to participate to bring a small $1.00 item for door prizes. This isn't much, but just something we had been kicking around. This will be held in a community center with plenty of tables and chairs for everyone to be seated. Any suggestions will be appreciated.

By BSW