I use the heavy thorn resistant tubes in all my bike tires, and I use a small fine tround file to debur the wheels where the valve stem goes through, use the wide rim strips and I never have issues with flats even though I do most all my riding on rough country dirt roads.
We gotta take our tires and tubes seriouse in rural West Central Texas, everything we have here will, stick you, sting you or bite you, the dirt roads are littered with fencing nails, pieces of barbed wire, baling wire, glass, cactus thorns etc.
Put you some heavy tubes in those tires and be sure not to pinch them when putting tire back on wheel and you have way less issues with flats and much less chance for a blow out also.