Planning help for the big day

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Hi everyone
We booked our wedding for October 2019 at Paradise Cove and it was all very exciting but now I’m getting a bit stressed and anxious about planning the day itself.
Our ceremony ends at 3pm (this was the latest we could get) and I had ideas of going for a nice meal at about 5 or so (we have 4 children in the group)... however, what are we going to do between 3 and 5?! I think because we have kids it’s a bit harder as we can’t just go somewhere to chat and have a drink. We kind of need some structure.

I am wondering whether to change the time of the ceremony to 11ish and then go for lunch, so that we can go straight there and the ‘wedding’ all be over by late afternoon.

I think I am struggling with wanting it to feel like a wedding (like you would have at home for instance) but it not being like that as we aren’t contained as only having a ceremony and needing to organise the rest ourselves.

Sorry for the huge ramble. Would really appreciate some help or reassurance!