The Solar filter is not required during the total phase of the eclipse. There are many web sites that will help you set your camera correctly. It sounds like this is your first total solar eclipse. If so, I cannot stress enough that you should not spend your 2.5 minutes trying to get the perfect shot. Research a couple of settings, bracket a few shoots then get out from behind your camera. Trust me, your photos, will be secondary to viewing the entire event. Watch the shadow advance across the landscape, feel the temperature drop, the animals in the area will go silent, Mercury and Venus will be brilliant in the sky, people will gasp and hug and cry and dance. It is a near religious experience for some. We have seen three in different places around the world and hope to see many more.

Here is a link to a 20min video that will help explain the eclipse chaser mentality. Sit back with a beer or a glass of wine and enjoy.
http://eclipseguy.com/videos/still-hooked/

If you have access to AC take a look at the Canon ACK-E6 AC Adapter Kit for the 60D.