If you enjoy drinking you'll have an absolute blast. Opening Day is referred to as "Christmas in April" in our 20-pack ticket group and we regard it as what should be a national holiday. Like everyone else stated, if you go the tailgating route - get there early. We typically get there 5.5 hours before first pitch and we have to wait in line for 30-60 minutes before they even open the gates (once traffic backs up to the freeway and creates hazards basically) And like Bikeage said, it's likely you'll get heckled by at least a few drunken college kids; but for the most part it's a joyous occasion and most people are pleasant. If you want to enjoy a peaceful, uninterrupted, game I'd recommend going to the second game as well if possible. We usually like to try and go to both (when it's not during the week like this) to be able to party for one game and then thoroughly enjoy the game the next.