Like mentioned by the rest... there's no need to dress up so
much, even if you're sitting at the first few tables... even if
you're going to open the door to the car...
Basically in the morning when you open the door, it's enough if you
just wear a neatly-pressed shirt and a decent pair of pants (no
jeans). Then in the evening, just throw in a tie and
viiiiiiiiiiiiiiola!
Direct relatives yes... but imo unless you're the
bride/bridegroom's sibling or father... a shirt and tie would do
fine...
