Wedding photography is not mainly a camera. 5D is enough. Better bring more lenses. Recommended ones are 16-35, 24-70 and Xiaobai. You really can't use the 28- 135 3.6-5.8 that comes with 5D. Bring a flash to avoid insufficient indoor light, and finally bring a tripod for taking pictures.

5D won't take pictures, 5DII can, but the price will be five or six thousand yuan.