Hi @jan61
Distance is something that most people don't have to deal with, so I'd suggest you really focus on how your remote circumstances are managed. Don't get too wrapped up with the actual poisons, they are nasty regardless of where you live.
You need to figure out how you deal with unexpected complications, what support services are available and how you can access them. Find out who the social worker is. You may not need them, but if you do, don't be stuck starting from scratch. Find out about accommodation and transport subsidies and which hospital is best if you have an issue and where you will be sent if something happens that can't be dealt with at your local.
Cancer is a bit like pregnancy in remote areas, some people just chug through it, some unexpectedly become high care and that is where a bit of forward planning is useful.