I understand the urge to want to capture the eclipse with one's camera but I would strongly recommend taking those few minutes before, during and after totality to just suck it all in with your eyeballs and NASA-approved eclipse glasses instead of fretting over gear like cameras, lenses, telescopes, filters and a tracking mount. And it isn't just the direct show that the sun and moon will be putting on overhead - it is also what goes on on the ground: the way the surroundings look and yes, even the reactions of the people and other living things around you. It will be over before you know it and trust me, there will be a gazillion spectacular time lapse images of the event everywhere afterwards......
To each his own, no doubt but it really is worth thinking about this - it doesn't happen all that often and it can be a pretty moving experience if you aren't distracted. Just my 2 cents from an amateur solar astronomer who has a fair amount of high end gear for observing and imaging the sun - none of which I'll be using around totality (and may even leave at home entirely).