Technically I don't have a big age gap as my dc are 18, 16, 13, 11 and 10 but younger 2 have significant SEN so they are more like 7 and 3 in their interests and development. 16 year old also has significant SEN too so I can leave him alone in the house or with ds1 for 30-60 minutes while I do the school run but no longer than that.
We have just got to the stage when days out are more enjoyable than stressful with the younger 2. Inset days are best for days out as they aren't as crowded but we can't go too far away because we have dc at 3 different schools and the last 2 times we took off with 2 of the dc when one school was off we got a call to say that one of our other dc are having a meltdown at their school and we need to come back right now. So we've kind of given up on doing that.
Next week we have all 5 dc off school/college one day in the week. I get all excited but then dc1 points out he has an event planned in the evening. In laws (who happen to be there when we are talking) start winding dc1 up about traffic and how we'll never be back in time to take him, then announcing that they want dh to do something for them instead which could easily be done the day before. So now dc1 is getting stressed and begging us not to go anywhere. Then dc2 has a strop because he doesn't want to go anywhere. And we haven't even decided where to go yet! Younger 3 all want to go somewhere, dc3 has suggestions, younger 2 would be happy with the park tbh but happy to go where dc3 wants to go.
Facebook is full of posts saying you only 18 summers with your children and you should make the most of it. But I always thought that once the older ones got to the stage where they didn't want to go places then we could just leave them at home. And I thought that when I had 5 dc in 8 years then I would end up with dc at a vaguely similar stage 10 years later, or at least be able to leave the more grown up ones if they didn't want to come. What do other people do when they have big age gaps? Do you just take out the younger ones, bribe the older ones with lunch out, or do you go to Alton towers every weekend?