The venue my FI and I have chosen holds both the ceremony and reception, but it is also a public state park so there is a very strict time frame to adhere to. The venue is a historical life saving station(similar to a light house) and is open until noon on saturdays to the public. So the vendors and my BP and I(lots of DIY decorations to save $) can begin to set up at 12pm and the ceremony begins at 430pm.
Now my worry is not about setting up, time for hair/makeup/etc we already have a schedule for that(i know it seems silly but necissary) my huge worry is that my FI's family likes to show up early to EVERYTHING. When something is scheduled at 2pm they show up at 1230, so it is not even a few minute early, its extreme. I am a bit concerned that they will show up and everything will still be going on! Is there a polite way to inform them that the ceremony is at 430pm so they really should not be there any earlier than 4pm?