A few days after getting home went and bought a new tire to replace the bad one.
Chapter two....
Was heading up to St. George Island State park for a week of camping. About 3/4 of the way there stopped for a potty break and noticed one of the tires was really low. Was down to 25 psi from the normal 65...
Pressure was good before we left.
There just happened to be a tire store right next door to where we stopped. Pulled the 5er to there and they pulled tire to check for a leak. Tread was pulling apart form the belts, allowing air to leak out...no fixing this one
He offered to put the spare on, but mentioned he had new ones in stock. So, 30 mins later was driving off with a new tire.
Two trips, 2 new tires. Will be getting the other 2 replaced before the next trip.