I agree with the 24-70 mm. That's a good all around camera for a wedding. You don't necessarily need a 5Dm2 as a backup camera, but if you can beg, borrow or rent another camera like a 50 or 60D as a backup I would, always bring a backup. Even a 40D or a rebel.
A 200mm or a 150 macro lens is also a good one to have, of the two I would actually recommend the macro, so long as you limit the range they do okay with focusing and it lets you do nice closeups of the rings.
If you don't have a fisheye lens don't bother renting one. They're fun to play with, but for weddings you really want to know what you're doing with them, and even if you do, you'll only use one or two of the shots.
Visit the location ahead of time and test out the lighting. I've only shot in one church that doesn't allow flashes, and natural light usually won't cut it if they want good shots at the alter.
Make sure they give you enough time for the portraits. Estimate double what you think you'll need. Especially if they have a large wedding party.
On the day of the event, I like to photograph the groomsmen and the groom and than the groom and his family. Switch to the girls, do the bridesmaids photos and than the bride and her family. Go to the church shoot the ceremony, split somewhere away from the rest of the guests and do the shots of the whole bridal party. Ideally you then draw the bride and groom away by themselves. (This doesn't always work out) and do portraits of them.
The less people you have around the easier it will be to work. Don't be afraid to ask people to hold off on taking the same photo you are. The more people snapping photos the more eyes will wander during the shot.
If the bride wants to do photos at the reception hall try to get them taken care of before dinner and dancing. Once the reception starts it's very hard to draw people away. But once you get that far, it's pretty easy.