@*onlyboys2*, I am very sorry to hear of your situation this summer and although I am not in the same situation as you I can understand how tough that must be.
Why not change the narrative? It will be hard this year but every year will get easier?
You re not on holiday on your own and daddy is missing. This year you and your kids are going on your first adventure.
Research the area well. Turn every sightseeing into an adventure, you re not a confident swimmer? Be a team. Work on everybody’s strength. Decide the 3 of you on some rules poolside and in pool and give some responsibilities to each of your kids, etc.
For work reasons (i can have time off and he cant), I always have 2 weeks with my kids before my husband joins us.
For the 4th summer in a row I take them on a road trip through France. I keep the costs low, we build an adventure, everything we do or see is either spooky, thrilling or sometimes “boring”: we building it in our head. But it is like we are on the Island of Adventures and I must say as much as I love when we are the 4 of us, I realise that the road trip is what I will carry on doing for as long as I can. We are now a proper team and we each play on each others strength. This year they are starting to take ownership of the activities and places to stay. Next year they ll build the route.
Embrace it, you ll have a lot of fun.