That's hard. Obviously you want to set some boundaries and not give rewards for acting up. On the other hand though, swinging is a calming activity for a lot of kids with sensory issues, so it may be something that's calming. Sometimes it's good to give a five minute warning or a three minute warning when it's time to go.

I agree with Allison, swinging is a very calming activity. I wouldn’t punish him for resisting to come inside. Maybe just give him some ice cold water if it’s very hot outside. Our ASD kids are prone to have sleep problems, so he likely isn’t fighting you on nap time for no reason. I’ve found we can’t treat our ASD kids the same as a neurotypical child because they function differently & punishment doesn’t work the way an NT child perceives it. Hope this helps.

Let him wear himself out.
I learned a long time ago to just start enjoying a drink and snack(s) and not to 'force' it on them, just make it like you are having a good time, enjoying the treats.
It'll solve both problems.

Just worry when he can’t sleep. Nap it is not necessary but sleep is important. Swing is good activity

Yeah - sometimes my son and even I do forget about water and snacks and breaks but good to remind