I am going to Seattle in September to visit.  While there I will be catching a game at SafeCo Field to see the HATED Mariners play the HATED Yankee or the *HATED Royals.  As much as I will HATE to see this game it is baseball and I don't hate baseball.  Even if its "Junior" league baseball with "Junior" league rules.  

SO! Knowing this, have any of your visited SafeCo Field? If so can you give me some tips?  Where should we sit?  What are the chances of getting beat to within an inch of my life if I wear Padres gear?  What food should I partake in? Are there any "Secrets of SafeCo" I should know about?

I need to arm myself with as much information as I can before entering the stadium of our "Natural" and HATED rivals.

Thank you in advance for you tips, tricks, and survival methods!