Short answer, no! You definitely want to reserve a place prior to arrival!! Windsor Hills is getting to be very booked up and popular, and the area is quite busy this spring, while you should still be able to find a place in Windsor Hills, it's not run like a hotel where you can just show up and expect to find a place when you arrive. It's all bookings by owner, or bookings through local management companies in the area. Most of the MCs don't operate "short term" like this...they might be able to accomodate you, but this is definitely not how they normally operate either, they expect guests to make reservations and arrangements well in advance of arrival.
Your best bet...visit:
www.windsorhillsrent.com and book a place for the dates you will be here!
If not, you can try one of the large MCs.
http://www.oasisvacationhomes.com (ours, they're excellent, but you need to book in advance!)
http://www.allstarvacationhomes.com/
Global
IPG
Villadirect
There is no "front desk" or reservations in Windsor Hills at all, so if you just show up, you're going to have to first find an MC, then hope they have something open in the resort, somehow make arrangements on the spot, and then check in ....definitely NOT the way to do this! You're far better off going direct from an owner and picking the place you want to stay in in advance...or doing the same through a MC.
You could call an owner or a MC a day before you leave and get reservations still and pay with a credit card, just don't show up and expect to find something, you might be sleeping in that van! LOL