Budget has an AM rate and you can earn miles as well... the code is listed on their website and they often have a coupon you can click to activate that will give you i *think* 25.00 off
ANY of the sites that have things like "insiders club" or whatever they're called .. sign up and go for it .. most of those will give you a 5 - 10% discount and stuff like a free class upgrade.
Try the codes that you'll see listed on Mousesavers site .. i know that the southwest code works with National & Budget ... you don't need to be flying that airline and the rewards are free to sign up for.
Hubby is currently in Ottawa and i booked him a car with Alamo for a ridiculous rate ... 65 for 1.5 days and when i looked last week it was quoting at 125 per DAY so book now and change if you need to! Have fun in Vancouver, we were out there last September and had a great time
ALSO if you have AM and you have some miles you can check that out too, we often get some great deals since you only need to pay for the tax then.