Welcome @jhbh2 Couple of rather huge questions!
Started to answer this this morning and realize I didn't finish so I'm sure others have covered a lot.
Shelf life for bonbons varies greatly depending on the available water in the filling - it can be anything from a couple of days for a ganache made with equal parts cream and chocolate to months for some caramels, nut paste based fillings, butter ganaches.
Totally agree on the humidity controlled case if you can afford it.