Hi
On my experience of patching punctures: glue-patches take time to stick firmly to the rubber. So i chose to replace a new inner tube for the punctured tube, and replace the flat later in the tour or even later at home with the patches. Never seen the glueless patches!

They also require pressure to stick firmly to the rubber. On the weight issue, we must admit that the sarcasm from the other bloke in this forum was funny and to the point. You will never notice 100g more or less of rubber or patches in your pack, not even climbing. Besides if you travel on your carbon fibre speed machine you're already on a light bike- and these do make a difference when climbing compared to an AL road bike or MTB. On a tour, it should not make much difference, again unless you're only climbing.
Be safe.