Staying on the hill is the only way to go in Big White - it's a 50 minute drive from Kelowna and that road can get ugly. The village has everything you need - restaurants, groceries, booze - but of course you can find more and cheaper in town. We usually stock up on food and booze in Kelowna, drive up to our condo and park the car for the week.
Almost all of the condos are privately owned and rented out by people through agencies. Big White central reservations is the worst. They take about 40% off the top. If you google for Big White condo you'll find online agencies such as Owner Direct, which will usually hook you up for about 10%. I think last time we did this we paid about $225/night for a 3 bedroom ski-in/ski-out deal. Go for the Sunday-Thursday stay - the prices are jacked on the weekends.
Other than that, have fun - it's a great hill and there's something for everybody. There's super-nice blue run carving off the Ridge Rocket, and some great green/mild blue run carving off Black Forest. IIRC most of the black stuff was powdery or bumped up but that's cool by me. There is a great steep groomer skier's left off the Powder Chair, forget the name but it's easy to find. Don't go straight or right off that chair unless you like bumps and pow. I expect Shred will chime in anytime now - he probably has a better pure carving perspective, I'm some sort of alien hybrid rider.