My parents are mentally sharp but increasingly immobile. Also very stubborn and will not arrange paid care or help, or downsize or have adaptations to the house (sigh..)
I'm not doing anything regularly for them, because I'm afraid I'm taking the same view I did with my teens, that you don't help by doing it all for them. However, I do respond in emergencies and in recent months have taken them both to A&E twice, and made sure they were both OK when one or the other had a stay in hospital.
The only other person they can call on locally is my young adult DS, who has fragile mental health following a trauma. He helps them quite a bit by doing odd jobs and shopping etc, but doesn't drive. He wouldn't usually be the person they call in an emergency.
I'm worried that when I go away, he'd be the one they rely on, and if he wasn't able to help "enough" in an emergency, that could add to his trauma.
How can I "protect" him, without sacrificing my holiday, and every holiday to come?