I have had good luck with the SLIME repair Kits
but if you wanted better advice, maybe contact a good tractor tire service center and ask what they recommend, as they would have more experience with what BRAND/brands, have better tools included with there kits, as this is a BIG part of trying to push a plug thru a tractor tire as to say an ATV or lighter thin rubber tire carcass
and I know there are different types of plugs, some are shaped differently and well made of totally different compounds and looking plugs
I have bought several kits over the yrs to keep onboard different atv's/trucks and things, and trust me they AIN"T all the same, even SAME brand from a few yrs down the road change what they stick in kits, as I used to buy same one's till they started getting plugs that for me SUCKED as to the old one's they had same with cheap tools that rust away real fast and bend easy as to the better one's they USED to come with!
but a GOOD tire shop should have the better info and even sell the better products
next question might be what portable air compressor to carry LOL
I have gone thru about a dozen of them too, some cheap models lasted longer than some of the HIGH costing one's sadly?? and they all don't fill a tire the same rate, some take a LONG time to fill a tall tractor tire! same with how long there cords are, not much fun finding out a cord is about a ft short of reaching a tire AFTER you got a flat LOL
been there before
now make sure all compressors/vehicles have 12 volt cig plugs that reach ALL tires