I feel like SUCH an idiot. I've never rented a car before and I'm completely lost. I can't even figure out where to put in coupon codes on the Alamo website! This is way harder than booking plane tickets.
I need a minivan from 9/29 to 10/9, pickup and dropoff at MCO. Unlimited mileage is a must as we'll be spending several of those days in St Augustine. The rack rates are insane but I'm seeing that others are getting good deals, so I know they must be out there -- but if I can't get the price down, I will rent two midsize cars instead of the minivan and DH and I will both drive.
Can someone school me in the very most basics of working this discount system? I looked for a "car rental basics" thread but no luck. I signed up for AAdvantage, Alamo Insiders and National's Emerald Club based on what I read at Mousesavers and in the last few pages of this thread (we have no Costco nearby so that's not an option). So now where do I start? I see the Alamo "deals" on the website but they all expire at the end of August -- where does one put in the coupon codes that I'm seeing on the boards? Are there any penalties for cancelling/changing between now and our trip? And should I be checking for lower rates once I have something booked? How often?
I would love it if someone could price this out for me, find me a good deal with a reputable rental company, and then let me know how it's done so I can book it. Are there any sweet, kind, generous DIS'ers with time to spare who might want to help me out? PM me if this is not the place for car rental morons to hang out.

DME is so much easier!