I have http://www.walmart.com/ip/Torin-Jack...-Jack/14560038
I even keep it in the box it came in.. I use it every year or two for checking bearings and brakes. I even replace all 4 tires last summer with it.
I just lift the axle between the ubolts on the axle. Few pumps and it is up. I have never lifted by the frame, Way to high and have to lift the, Way to high to get the tire off the ground.
If i was you. Practice once and see what works for you hooked up to the tow vehicle or not hooked up.. The bottle jack or make a ramp similar to Farmer's. Or buy one, Cheap enough either way. The practice will pay off the first time you have a flat if you know what you are doing. I would bet, I could change my tire in about 12 minutes and be on my way. Especially with the 18volt impact from harbor freight.
The scary part is having a flat on the thru-way and the flat being on the driverside.. EEEKK.. That is the night mare side.. You want to either make quick work of it, Flares, Make it to a u'turn Or play it safe and wait for road side. You have flares and such?