The patch is the normal way of repairing tubeless tires in Latin America (vulcanized patch) . Don't worry about it any more, if it has not leaked it will hold on for the duration of the tire's thread... The low speeds you'll be riding won't really show if the tire is unbalanced either.
But, I'd buy a tube just in case it happens again, so you can get out to civilization. As I'm sure the extra space on the bike is very limited, you can buy a 19 inch tube for the front tire and in case you need it for an emergency, just put it in the rear tire... not ideal, just some extra insurance.
SS. '98 BMW F650 / '06 WR250F / '07 KTM 990 Adv