Patch at home as others have said. Wise and respected posters have mentioned stitching, you should listen to them.

I, however, am feckless and lazy - so I use a small one of these to clamp the patch tight while it dries, sprinkle talc or ground chalk before clamping so the patch doesn't stick to the clamp.

http://www.rapidtoolsdirect.co.uk/im...ck%20clamp.jpg

Incidentally the little clamp is also v useful for holding v-brake arms together while you do up cable fittings etc.