Glad your still breathing [:|] I think I would have been a little more nervous considering what happened to you last time. Taking the shots was a good idea considering where you live and how much land your dealing with, your going to have a more than normal chance of being stung.
I have been stung by many different kind, the worst for me is the little Yellow Jackets that build a nest under ground, and it's usually to late by the time you know there there. I have escaped a couple time by not moving and leaving the tractor running, they seem to go after the noise or vibration and try to sting the tractor, then I try to get away slowly until they calm down, the first time i jumped off and ran and a few chased me, I did get stung that time. They are about the smallest but they hurt the most.