We did six weeks every summer. Amazing times living a life in another country. My DC’s experienced so much, made new friends, tried new things. We could never afford to spend such an amount of time in another country. It is a lucky to have this option.
Some tips.
Honest conversations setting out clear rules, including the DC’s if apt.
My DM had a habit of ‘doing everything for the DC’s, burning herself out and blaming me for not doing enough ( even tho she was doing things for them that they were capable of and I would never do at home).
Plan separate time - a trip out alone ( beach, municipal pool), planning and preparing a picnic which releases your parents from providing.
Get into a simple routine. What happens at the start of each day? Who cooks and when? What does the week look like? My DC’s had picket money each week. Friday was market day and they looked forward to Friday for their shopping ( new toy, sweets..)
Keep some days very simple. We would visit the garden centre, DC’s would choose a plant, we would go home and garden. It helped my parents and kept the DC’s busy.
I planned play at home ( outdoor sports games, painting/drawing/crafts). Helped them to learn to play, then left them to it. No body bored or moaning.
Agree shopping costs. We would get a trolley each. They would get the basics, their usual shop ( cleaning stuff, store cupboard foods) and I would get the holiday extra’s and treats ( for me, them and the DC’s)
Plan a break within the holiday. We did a hotel city break with my parents and I also did a short holiday camp stay, just me and the DC’s. It gives everyone a break.
Check out local activities. My DC’s attended the local holiday clubs occasionally alongside other kids. These were provided free by the local ‘council’.
It is a huge opportunity, be positive, compromise and enjoy.