Me too...When I go away for say three or more weeks,I leave a key,jewellery case,laptops etc.with my neighbour.Empty fridge or perishables,top up the electric meter (prepay).Lock windows ,set timerswitches placing a lamp in front of the window(not too near if you have nets or voiles).The reason for this is ,it is difficult to see past the light into the room.
Plants...there are gadgets which keep them watered,if not,ask neighbour if they would be so kind as to do it...bring them a big pressie back.
This is,in my case,if all the family are going together.
Otherwise,no need for the "military operation"
We tend to go away in the winter months(being summer at our destination),so the garden is not a problem.