I have been trying to figure out what would be the best corporate discount code to use for my 17 day rental (from Rapid City, S.D. to Kalispell, Montana). They all seem to be about the same though BJ's seems to be somewhat better than AAA, or AARP or VISA,.... But there must be something that gives a decent discount. Any thoughts? Has anyone found a really good corporate code? Or good discount coupon? (The BJ's corporate code that I'm using right now is 7014696 along with the coupon AD8721SDB for my over 10 day rental, for less than 10 days you can use AD8Z32SDH which is almost as good).