I type as a retired Hospice RN and a fulltime RV'er for 13 years who plans to die out here, somewhere on the road. (Hopefully not ACTUALLY on the road) Until you are absolutely forced to stop living the way you wish, don't. The most frequent regret that I heard expressed by hundreds of dying patients was that they gave up too soon. Finding a sedentary "place", curling up in a barcolounger and watching mind-numbing TV while eating huge quantities of largely ineffective drugs is an accelerated death sentence if there ever was one.
There are so many mitigating factors at play and everyone's circumstance is different. Bottom line for me is that, when life as I want to experience it becomes too painful, problematical or simply not fun anymore, I'm checking out, by my own hand, with my dearest wife and friend's blessing. Should my final event leave me incapacitated, she knows what (not) to do.