Hi Tweva.. we had the same experience as you with vitamin D. We now take lots of it too… and try and get sun exposure too. Sometimes we strip off when hanging the laundry.. to get full body exposure… one of the advantages of being remote rural.
But having been “bugged out” for many years I appreciate that by good luck we did not get so remote that we do not have access to Drs, schools and small towns with all the normal services. One of our nearby towns.. about 20 miles.. has a small hospital that really has excellent health care for most things. This is even more important now that we are older.
I too could bug out to a remote and difficult access part of my own farm… and from there go into dense forest without roads.