Nats are 7th most expensive park in baseball for a family of four:
http://www.bizjournals.com/washington/news/2013/04/02/nationals-game-among-most-expensive.html
Interesting comparison. The main reason we are seventh is due to average ticket prices which still trails teams like the Yanks, Cubs, and Red Sox. They said that draft beer prices are $8.25, the highest in the league, aren't they $9 this year? For tickets they took the average price, for parking they took the low price, so they used $10 for Nats parking. The free programs are the best thing we have going. Are hats only $15? Not a bad deal if true, they took the team's word for it so the Nats probably keep the $15 hats on back order.
About a 20% increase since last year, by far the biggest jump in the league. The Nats would argue that ticket prices stayed the same for season plan holders, but this index is for a family going to a single game, so they should use single game prices (with service charges) rather than the discounted prices for the ticket plans.
For premium tickets, which weren't factored into the total cost, the Nats had by far the highest prices. Seems like they should be included, as the Nats have a lot more premium seats than other teams. Adding those in puts the Nats right up there with the most expensive.
Funny thing is how those free programs factor in, most teams charge $5, take that out of the equation and the Nats jump up a few spots in the rankings.