Advice for the summer holidays!

[november90]

My ex-husband has my eldest son two nights a week currently. He doesn't have him for the full days adjacent to these nights because he's at work so he only really spends one full day with him alongside these nights.
Our son is four years old. He is really easily unsettled so routine is really important to him. I knew the conversation about summer holidays was going to come up, exes told me he's booked a week off And he wants to have our son for the whole week. I'm a little taken back by this, I just feel a week is a massive jump in a long time and it does concern me about how my son will feel going away for this amount of time. I haven't agreed to anything yet, I said I need to think about it but I know that if I don't agree to it he will kick off and become really awkward.
What do people do in this situation? I know that I have to pick my battles, but I do feel this is such a big jump and a lot to expect from a four-year-old. He's never been away from home or me for more than tonight.

I would send him

Well as expected I told him I want to think about it and now he's threatening taking more childcare during the week which is ridiculous as he's just reduced his childcare due to his new job. I can't help but feel like I'm almost being blackmailed to agree to him. He does this a lot. I just feel like ds is still very young and easily unsettled and I feel he would struggle being away for so long :(

Would a Monday - Friday be more suitable. He is his dad. So had as much right to time with dc as you. And dc isn't a baby now. Little yes but adaptable. And it maybe that they get a few days in and dc loves it. Or ex is struggling. I would suggest that if there is any problems dc can return home. Don't phone everyday. This is unsettling for everyone. And make plans for yourself in that time.

At four years old having him for a week in the summer holidays is honestly quite mild. I feel like through court he would be given much more time with him.

Thank for the replies.
It frustrates me that o have to make decision for my son based on what a court would decide and not what is more suitable for him. Oh well.... I'm as powerless as I feel in this separated parenting.