good luck with that. you will never know until you call the resort direct. Unless you are willing to visit the rent/trade board and put in a bid with other DIS'ers.
I'm figuring that for that season (April) a 1 BR would probably be about $385/night or if you're a DVCer, it's 27 points/night during the week (can't remember weekends). But you're better off, like the PP said, calling the resort itself.