Depending on how dedicated you are to not being found, there are probably a few things you can do. But it definitely depends on the amount of freedom and options availible to you.
You can tell those around you, your going to a certain place and obviously not go there, but then you can call or text someone, to let them know you got there safely to throw them off.
Something I considered doing before, was sending out a delayed text message after I died, to say my last goodbyes beyond the grave. You could do something simmilar, but use it to make yourself seem alive to get more time. This can also alert others if they send you a text and your reply makes no sense. My parents are not technologically literate enough to text back in my case.
I recommend saying you're going on a trip as previously mentioned in an above comment. Send a text on the day, saying you arrived safely but also have bad reception and probably won't get calls coming through. Then I would setup delayed text messages to fake being alive for a while.
I'm personally not a fan of letting an innocent stranger run into my corpse, so consider if that's something your okay with, and if you have other possible places to ctb.
I hope you have everything planned out in time, better to be sure than to go ahead with uncertain plans.
Sometimes when I plan my way out, I get a slither or positivity and think, "not yet". After enough "not yets" I might be better. Whatever you choose I wish you well.
