Yes, it's possible to live without bitcoin, especially for few moments like a weekend, vacation or holiday, but if we think about all the years of our lives without btc it will be really painful to imagine we couldn't have access to it, because bitcoin already fulfils an important part of our daily routine, that are the personal finances, indispensable to live in a capitalist world, which allows us to have access to more confort and life quality.
I believe to live without such confort and welfare couldn't even be considered to live, but just to survive and in very precarious situations, similar to a lifetime camping as you said, where food, water are scarce and another resources inexistent.
Well as I just explained yesterday, it's so easy for me to think of life without bitcoin, I just need to rewind to 4 or 5 years ago. Same thing as today, except now I do have a small side income from Bitcoin and it is slowly growing to a small savings that I would never have been able to collect in the same 20 years without it.
That's good enough for me of course I am not complaining but... let's be honest and say Bitcoin hasn't changed the lives of the majority of people in a truly useful way.