Believe me and the OP that you guys are looking WAY too early for car rentals. The prices will drop closer to the date you need to pick up the rental. Trust me!
Take a look at the Aug car rental thread it was started months ago and those DISers were stating their rental prices are high yet if you look at the last pages of that thread you will see that the prices have now come way down.
So don't panic you are just looking to early. I never book my car until 7-10 days before I leave and the last 3 trips I got a mid size for a week at
Alamo for just under $100.00 I have another trip planed for Oct as well but I am not going to book until I am a week to 10 days from my trip date.