Go on holiday without losing customers or checking your phone

Help me set up messages so I can switch off on holiday.

My business: [what you do]
Dates away: [from and to]
Who covers emergencies, if anyone: [name and how to reach them, or nobody]
What customers might need urgently: [e.g. a leak, a booking change]
When I'll reply: [e.g. from Monday 9am]
Bookings already in the diary: [any that need a reminder before I go]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A Gmail auto-reply: dates, when I'll reply, who to contact for emergencies, under 70 words.
2. A WhatsApp away message saying the same in under 40 words.
3. A short post for my social pages and Google profile, with the dates.
4. A message for anyone with a booking in the week after I'm back, confirming it's still on.
5. A first-morning-back plan: who to reply to first.

Use only what I've given you, leave blanks for any price or fact I haven't given, and don't invent anything. UK English.

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