On the BAF issue, I'm not entirely sure what SDC's stance is on trading. I know they've definitely allowed it to go on for a number of years now and will let you enter the park with BAF's that come from other people, but I'm not sure it would look good for us to promote that practice in general. I'll have to look into.
As for discounts in general, the eagle's lodge deal pared with the 2 days for the price of 1 ticket is the best way to go, IMO. Also remember that SDC allows you to bring in your own food and drinks into the park, so you could bring a small cooler and take advantage of that.