I was the guy fishing at the downstream end of the Head-Harness portage who checked my pack for antihistamines but didn't find any. Sorry to hear you didn't make it back into the interior, but glad to hear Banjo is okay. Though you were obviously a ways ahead of us (we were on our way in when you were coming out), the moose was still at the turnoff when we drove in... and if it helps, that was the only one we saw this weekend, so your misadventure did increase your moose count. The campsite on the awesome-looking rock point got snapped up between the time you left and the time we arrived, unfortunately for us since we wanted overland access to the backpacking trail.
I think you're being hard on yourself in the blog though... after all, the fact that you live an hour from the west gate WAS part of the reason everything turned out okay. Granted things could have gone worse, and some additional preparations might have saved the trip, but it's impossible to know all of everyone's allergies beforehand. I didn't know I was allergic to hornets until I got stung at the age of 18 and went into anaphylactic shock, and that was in something of a wilderness setting but thankfully just a short walk from a vehicle. Yet how many people carry epi-pens on weekend canoe trips just in case they have an unknown allergy? I don't even carry one, now that I've been immunized (and stung a few more times to prove it). Maybe a good idea though?