I'm a Fluffy Owl with my dd's Brownies, we are both HMS and look like a pair of old crocks some weeks
Brown Owl does have a habit of forgetting what we can (and can't) do but I made quite a big deal of with our meds on pack hols (I'm the First Aider so I was in charge of doling out all regular medication. I made sure that Aprilia had hers issued with full paperwork etc with her meals as she usually would so in full view of the other leaders rather than just slipping them to her quietly as I would on other group events) I am fortunate that I'm a "grown up" and that the unit can't actually continue without me so I'm not afraid to stomp my foot (gently though - I stress fractured it last year!) if I see even the smallest hint of a "there's nowt wrong with you" creeping in, not just with me and dd but with our other "special" Brownie too.
I know it's a lot harder for Young Leaders as there is an expectation that you are all young fit and keen to do all the stuff us old crocks can't any more
but you really do just need to keep on reminding those who are old enough to know better that you *are* disabled, even if it's somewhat hidden in normal life.
BTW - love the idea of a necker..... you can *never* have too many neckers......