hullo, my method is SN too.
personally i'm going to a walking-distance semiwild park that nobody uses as a thoroughfare, to spare my younger brother (with whom i live) from finding my cyanosed body. there are other places i'd prefer but they'd be too risky (busy) and i can't drive anyway. some SS members went to the sea, a sunrise, a forest, or some other pleasant "nature scene" for various reasons (e.g. avoiding family discovering body, isolated/not busy/low chance of being found, peaceful, positive memories, etc.).
i'm also leaving a simple note for my family: how much i love them, how grateful i am for all of their love/support/help, that there's nothing they could have done to change my mind, that they shouldn't feel guilty for anything, that i hope they can forgive me, and some secrets that are part of my suicide's rationale. i will apologise for their grief, but not for my decision. i've accepted that they will suffer and, although i doubt a note will help much, they deserve the effort. (fwiw my "note" is a camcorder video on a USB stick, i left some [dubious attempts at] humour in there that would fall even flatter in writing.)
anyway, some of what i asked myself to decide:
note: do i feel okay about leaving a message? can/should i be honest in it? is what i want to say worthwhile? if it's worthwhile, consider why when writing it. can i make sure that everything i say won't cause my family more grief/pain/confusion, and leave out everything that might?
location: what would be best for the people i live with? which places have the lowest chance of being found/"rescued"? which places are accessible? will the place i choose make any difference to my intent/survival instinct/etc.?
only you can decide what's best for you and your family, weigh up your options, pros/cons, etc. my personal goal is to minimise the pain my death causes, to me and everyone i'm close to (mostly my little brother, rest of family, and my owners*). but this can vary too, e.g. a member who recently said goodbye (SN) was very close with her mother but deliberately did it at home because she knew that her mother would
want to be the one to find her body... so everyone's situation is different.
hope you can reach some conclusions you're satisfied with. <3
* cats