By a few cracks do you mean like this?
This happened in March on Route 75 in Naples Florida. No jack that would work, the car jack wouldn't fit right, no spare tire. I left the trailer, went home and got a jack, some "Rust Buster" and wrenches. Came back and broke off two studs. I left and came back with a torch and broke off another stud. After I finally got the wheel off I went and bought a new tire and installed it and drove back to the house with only two studs.
I ended up getting new hubs for both sides on Amazon and greased the studs before putting the nuts on. Now (as I should have been doing anyway) I will loosen the nuts every year and put new grease on the studs.
Lesson learned the hard way and I missed a great day of boating!