I wish that was the case as I found this when I pulled over.

I must've spent too much time on the road today, as I didn't even feel the tire let go, couldn't see it in the mirror, and didn't even notice that the trailer was no longer level. (I thought I was alert - I'd just consumed a piping hot coffee 15 mins ago...!)
I didn't really plan the trip too well either, as I'd left the lug wrench at home, and as usuall the factory wrench for an '08 chevy is too big to fit the trailer. Wonderful.
Walked back to the trailer to contemplate a solution when I noticed this:

Just my luck - now I need two spares! I must've really irritated Karma on this trip! As I was returning to the truck I happened to notice the Barnsness trailer decal on the rear ramp - DING! a thought happens - I'm only about eight miles away from where we purchased the trailer! Hop in the Chevy, dial up onstar for a phone call, and viola I'm speaking with the man incharge! He (Nelson) even stayed late to await my arrival for spare parts and a lug wrench (great service, he's awesome!).
Purchased another tire and wheel assy. to compliment the spare and then proceded back to the trailer. To my delight I discovered that a Gm screw jack will lift a fully loaded 10000lb car trailer which allowed me to change both tires. To my dismay however the heavens open up and dumped buckets of water on me after I cracked the first lug nut loose. To my amusement, every passer-by got the enjoyment of seeing a soggy fat guy in a wet T-shirt. (I have no picture of that thankfully!)
All in all, was a worth while day - I got some excercise, spent some money, had a shower, and made it home safe and sound. Tomorrow I get to unload the trailer, and then make peace with the neighbors over my fledgeling auto wrecking yard that is currently under development in the back yard.