Car hire – shop around for the best deal. It worked out cheapest for us to book through Canadian Affair than go direct. We hired a 4×4 to get off the beaten track. Some roads were just gravel roads that we travelled on and a 4×4 definitely made for a more pleasant journey.
Accommodation – because we flew to Calgary and home from Vancouver we booked some accommodation over here before we left and book the rest as we travelled round which worked well. Had taken a phone and took advantage of free wifi.
Places to stay in Whistler – we have stayed at First Tracks Lodge a few times, its condos rather than a hotel but is really nice, has a pool and hot tub (nice for relaxing after a days biking), secure bike storage. Check their own website and Expedia to see where you get the best deal. The only thing you may not be keen on its that its in Creekside, but we really didn’t mind, we got the bus into Whistler village for nights out and taxi back and used the car.
Guide book – the best guide book we used is called 'Hidden BC' http://www.amazon.com/Hidden-British-Columbia-Including-Vancouver/dp/1569753296
Anything I have missed??