Taking DD’s to Disneyland separately

[Hilowmaybeno]

My in-laws are convinced this is a totally awful plan and we’ve lost our mind so I’m looking for some opinions. We have 2 DDs. DD1 is 4 and DD2 is 2.
We are thinking for DDs 5th birthday we want to take her to Disneyland Paris for a couple of days. The way it works out is DDs school close for summer on the Friday, we will do a party on the Sunday, her birthday is the Tuesday and then Thursday-Sunday (I know busy days) Disneyland Paris. I don’t think we should take DD2 with us as I want it to be a special birthday treat for DD1. Then in a couple of years when it’s DD2s 5th birthday we can do the same.
I feel especially since DD1 started school that we just don’t get very much time with her alone now, especially not with DH too and I’d love to spoil her a little for her birthday. It wouldn’t replace our main summer holiday it would be an add on so DD2 wouldn’t actually be missing out.
My in-laws think it might be fine this time but I’m asking for hell when it’s DD2’s turn and DD1 is 7.

AIBU to want to talk DDs to Disneyland on separate trips?

YABU By taking the kids one at a time to these hugely important (to kids) places, you're going to drive a wedge between your kids. They'll resent you and each other and they'll take it out on each other throughout their lives.

You should take them on these big trips together, as family trips, so that they know they're part of a family unit. If you want to spend one on one time, take them on little trips like to the movies or the zoo or lunch for a few hours while the other one is doing their own thing.

If you go through with your plan, start planning how you'll handle separate Christmases and holidays when their adults because they'll refuse to be in the same house together with you.