Am not sure you will even need that if you have 3 pin charging. EVs work great on holiday if you have 3 pin charging. Unless you're literally out of the door at 8am sharp and never back after 10pm a 3 pin is fine.
Late breakfast, leave the accommodation at 10-11am, back by afternoon for a rest, than out for some dinner, than back for some shut eye. Your likely find the car will be charged with no issues on a 3 pin.
Simply plugin when ever you are at the accommodation. I really love taking our EVs on holiday, its a great feeling not having to worry about fuel costs.