The Doubletree is walking distance from the Sounder station, which is a plus. I tried to take the Link light rail to a preseason game and got to the light rail station too late to find a parking spot anywhere - I ended up driving into Seattle and paying like $40 to park up close. OTOH, the Sounder is a drag because they only get you there JUST in time for the game, and you have to get back to the station in time to not miss the last train south. This can be a problem if the game is exciting until the end and everybody leaves at once - this happened to me at the San Diego game a couple years ago, and the last train was so crowded that a guy had to sit in the bathroom in his wheelchair, and stay in there when people used it because there was no room for him to vacate the loo. He hated it. All in all, I'd say the best advice would be to get to the light rail station at least a couple hours early and maybe before 9, and hang in Seattle until the game starts. I got to the light rail at 11 and it was too late. The light rail station is right across the street from the Sounder station (get off at the International District station, up the stairs to street level, across 4th, and down the stairs to the stadium north lot). You're right - the light rail runs regular service every few minutes all day, where the Sounder is a special run especially for the game and is more intended for those coming from Tacoma.