In the circumstance you describe, I would think an epi-pen completely unnecessary, and, as you are finding out, rather complex. My understanding is that epi-pens are for those with allergic histories, rather than the non-allergic general population.

I have a good friend who is highly athletic - college level pole vaulter, marathon runner, highly skilled rock climber - with a known sensitivity to bee and insect stings. he carries an epi-pen at all times. On one occasion we were climbing near a bee hive and, rightly so, he kept a very low and cautious profile. it was fine with me - I got to do most of the fun stuff.

There are posters here with greater training and more recent experience with this subject than I possess.. I hope we will hear from them.