You could always ask at check-in if there are any complimentary upgrades. It won't hurt to ask, and if they don't, then perhaps they will have some type of upgrade you could just pay for then. Also, I'm not sure if you've done it yet or not, but you can "request" certain things. They aren't guaranteed, but it doesn't hurt to ask. If you haven't yet, I'd call back and have some "request" noted on your reservation. I have read that if you request a non-smoking room, you are more likely to not be facing the parking lot. I think mostly, it depends on the time frame you are going, and if the resort is full or not.
Good Luck