Well personally I think nothing beats the
Thule 964 Revolver hitch bike rack. The Thule 964 Revolver hitch mount bike rack is definitely the finest and most popular model on the market today. Fits 2 inch hitch receivers and carries 4 bikes. The really sweet feature about the Thule 964 is that it offers a swing away mechanism for easy access to the rear of your Toyota Sienna even when the bikes are loaded. And unlike most other hitch bike rack models, the Thule 964 comes with all accessories for security and stability included.
For your golf clubs, I highly recommend the
Thule 682 SideKick cargo box. It attaches directly to your 2008 Toyota Sienna factory rack crossbars and is the ideal choice for items such as golf clubs. The Thule 682 SideKick is the easiest box to attach and remove without any hassles either. Unlike any of the other cargo box options, this model is also compact enough to ship via UPS and if you are looking to buy online the Thule 682 appears to ship for free from most car rack retailers!