Last year I booked my trip through AAA travel - I won't do it again. I was new to these boards then, and did not take the time to figure the cost of the trip by booking it separate. Next time I am going to buy an annual pass and book everything myself - and I think it will be cheaper. I am lucky - I get my AAA for Christmas every year from my sister!
I ended up cancelling my passes through AAA - they were no cheaper, and I wanted to have them well in advance of my trip (I had a nightmare of a time on my honeymoon with passes, so I am rather paranoid about them).
Good luck!