I've been reading the Leaving a Wedding Before the Cake Cutting thread and now I'm concerned with an upcoming wedding I'm going to! We have been invited to a local wedding on a Sunday afternoon/evening (4 - 10). This is also the week that our family beach vacation beings (Saturday to Saturday rentals - so we'd be going up a day and a half late). We thought we'd attend the wedding and leave early and head straight up to the beach (about a three hour drive). I'm guessing the ceremony will be from about 4 - 4:45. Then cocktail hour from 4:45 until about 5:45 with dinner starting at 6 and we'd be on the road around 7. Based on the prior thread - I'm assuming it isn't rude that we will be leaving maybe before the cake cutting happens.
I was planning on giving the bride and groom a heads up when I see them prior to the wedding - is that OK?