You know when you come back you will be tired, dusty and wanting to just jump in the shower and ignore the mess.
Before you go, plan where you will unpack. Is there a space in the shed/garage/attic where the camping gear lives? Plan to put it straight there and avoid double handling.
You will be over run with laundry, so have your washing up to date, and dryer and washer free so you can throw loads in the machine as soon as you get home.
And plan an easy dinner. Or takeout. No one is going to want to cook.
A bit of planning now will minimise the pain later! And make sure your WHOLE family is in on the plan and knows - car unpacked first - no exceptions