Since you have AAA, if you do get a flat just tell them you have no spare and want to be towed home.
IMHO I'm not sure the 25 or so pounds makes enough difference when you do have a flat and you have to be somewhere. If you can change the tire yourself the inconvenience is minimal, otherwise is it worth what you have to go through without a spare?
You're doing fine given your location and fuel saving obstacles you face. Check out the 100+ tricks thread to see where else you can do better.
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