Yes, wills done and kids have POAs for us, set up when we went travelling. My sister died at age 50, which spurred us on to travel for 6 months (camping!), instead of putting it off till tomorrow when we could afford to do it. Glad we did, with all the health issues I've been having.
My father has bought a funeral plan for himself, so if he dies before Mum, she and I won't have too much hassle.
Does direct cremation mean no service even at the crematorium?
I would leave it to those left behind as whether they want a service or not. After all, they know better than me what they need. However, I would want my ashes scattered along my favourite walk, where I connect to the peace and beauty of the countryside.