I'm going to make this pretty general because of what happened when I got too specific last time! However here's my general questions:
How far would you travel for a shower, be it wedding or baby? Obviously it would depend on the level of friendship, but what would it take for you to get on a plane for a shower? Would you even do that? Can anyone justifiably get mad at someone (not a relative) for not coming to a shower if it required a long plane flight, or does this also depend on their closeness/relationship?