You said four or five in your first post and now another five, so ten tubes? Is that a joke or are you serious? It isn't like you will never have a chance to buy more tubes every few hundred miles if not more frequently.

Learn to patch tubes and carry one or two spare tubes, three at most. If in doubt replace the tube and patch it in camp when you aren't rushed. Also in thorn country, check your tires for thorns any time you roll the bike off of the pavement.

The most likely reasons for patch failures are:
1. Not prepping the patch area well with sand paper.
2. Not letting the glue dry enough before putting the patch on.
3. Getting your fingers on the adhesive when applying the patch.

Item 2 is probably where most people screw up. It shouldn't be necessary, but might help to let the patch dry well even after application. So doing them in the evening in camp gives the best chance for success.

Oh and avoid glue-less patches. Get a patch kit or two, the kind with the glue, sandpaper, and patches.