i have been very fortunate not to be stung by my bees yet. each year i am treated to one or two yellow jacket or wasp stings. i almost look forward to the much milder bee sting! :)
one recommendation: even though none of us probably have had severe reactions, and the experienced keepers probably have developed some resistance to the stings, a bad reaction can come out of the blue for all of us. especially with multiple stings.
benadryl is a handy thing to have around. i buy the childrens liquid as well as the tablets. the liquid tastes like hell, but works faster. liquid is 25 mg per tsp. at the first sign of any reaction outside your norm, take 50 mg and if you do not have improvement within 1/2 an hour, take another 50. if symptoms are getting much worse within that 1/2 hour take the second 50 mg sooner. if things are not better with 100 mg, i'd get some medical advice. any respiratory symptoms require immediate medical attention.
any airway sting should be treated regardless of your normal reaction. it does not take much swelling to close an airway.