2 Blowouts, different tires, different axles, 1 hour apart

I have driven that stretch many times and I do not look forward to it. Its terrible! With load range E tires I dont think you would be overloaded. Wildcats are not lightweight trailers, i have one.But you did have lower air pressure than what is called for on those tires. You are a good candidate for 16" LT tires, but if that switch is not in the budget, just replace with E rated to match the others, air up and have a nice trip.