I have the same tires in 30mm. I carry both a tube and DynaPlug. Never used the tube so far, my prior back tire had three DynaPlugs in it when it finally wore out. My current rear tire has one, they work fine and seem to stay put, I’d call them a permanent fix as long as they are a tight fit in the hole. The Stans dart is intriguing, but I don't have any experience with them. I do know some people have had problems with bacon strips working their way out of a tire that the dart might solve.