Splurge on the Serfas Drifter Survivor, $20-25 bucks at your local bike shop.
They are 2.0, and I neither carry a repair kit nor spare tube, that's how ****y they make you feel.
I discovered a tear on my front after returning from NC on the recumbent, rec. on the sidewall said up to 100 psi, I was running maybe 60. But I was going to replace it (and did) when I got back home, anyway.
As to pdxrhett's luck, when I first got those early Wally World bikes in 2005, I had to pump up the $2 tubes at least once a week. That hassle led me to the slimers, at least they held air.