Just a quick question, but how badly does camber and alignment affect gas mileage on my Accord 98?

 

camber and alignment can effect gas mileage hugely depending on how bad the car is mis-aligned or how negative the degree of camber is on the tires. The thing about both of these things is that they increase premature wear on the tires therefore decreasing your gas mileage. Its said that such things as under inflation, besides being dangerous for driving and even when braking, can effect a cars gas mileage, so go figure how much more these 2 things you've mentioned effect it.