Here is a release from Yale on parking passes and tickets:

The last of the parking passes for the lots around Yale Bowl were sold on Wednesday afternoon in anticipation of Yale hosting Harvard on the gridiron Saturday at 2:30.

There are game tickets available, and there are other ways of getting to the 132nd edition of The Game. Fans coming to New Haven should click Here to see options.

The Yale Ticket Office is open 10 a.m. to 6 p.m. this week and tickets will also be on sale outside the Bowl on Saturday.

Directions for each specific lot can be found here. We encourage fans to follow the published directions and plan to arrive well in advance of game time. Parking lots open at 10 am and the stadium gates open at 12:30. To avoid unnecessary delays, please leave any unnecessary bags at home or in your car.

All lots at the Yale Bowl are pre-sold. No game day parking sales will be available on game day.  To accommodate fans who do not wish to park at the Bowl, or are not able to purchase a parking pass, Yale has partnered with the City of New Haven and the New Haven Parking Authority to provide parking options downtown and FREE shuttle service. Directions to these parking garages can be found here.

We are also hearing Reserved Seating on the West side of the Bowl is nearly sold out (and could be by the time of this posting).  

Also a link to a very thorough information page on The Game with links and answers to many questions.