I wouldn't bother with that bug out bag.
There are loads of bug out bags on youtube and most are put together by people who like to play the what if game. All that happens is they have a pack I doubt they could walk very far with, and the way I see it you should be able to walk with it as if it was a car only bug out bag it not going to be that useful once you have to abandon the roads.
I did my research (huh... for the sake of knowledge)
-pretty sure the camellia is perfectly safe
-As for plants containing saponin, large quantities must be ingested in order to be truly effective, otherwise there is hardly any effect.
-The calla isn't the most toxic lily... Other species like the Asiatic or the Tiger lily are known to cause kidney failure
-Now the cool bit about azalea is the "honey" : when ingested (for some species), it can induce delirium, dizziness, lasting up to 24 hours ! However it's not as strong as the tutu's, which can lead to coma...