I think a tradition is official on the 3rd time.
Do something three years running and you have yourself a tradition.
As far as the contest goes, you could ask for traditions on certain topics like food, games, music, most bizarre.
Another idea would be a what if scenario. Like what traditions could you do with relatives from 1800's if they were alive today.
That's all I have for now. I'll let you know if I think of any other ideas. :)
I thank you for your input Doc. Those are the kind of things I need to take into consideration. I was think that 5 years would be more of the tradition line in the sand but that is why I asked the question.
Please do let me know if you thing of anything else,
Sult