Mmmm, well, there may be a way to avoid both dishonor AND uncertainty for your parents, and that is by making death look like an accident, to achieve this both the drowning and hiking methods might work, drownings caused by riptides are very common in the US, by the same account, falling of a cliff while hiking or better yet, mountaineering is also a somewhat common occurrence, you could also disguise a car accident...
The catch? These are scary, messy and overall not nice methods to go, the fear of knowing you will drown in the sea because of exhaustion might be the worse one, even if you take some substance before to ease the burden, a car crash might work, especially if you purposefully intoxicate yourself and make it look as a DUI incident, but it is the most insecure one, you might survive, or worse, survive and injure someone, overall, you have to plan it very well, you have to fake a hobby, a vacation, a party and then the exact place, method and substances that you will ingest if you want to make it a bit more easy for yourself, etc.
Having someone bury you after you commit suicide sounds crimimal and illegal as hell, and you can't guarantee this person will not talk, before or after, I don't think you should do that.
Overall, it won't be easy, but is doable, I will finish telling you the same thing I say other people, your life is yours and no one else's, you are the ultimate judge of what happens, I have no right to tell you not to do it, especially because i'm struggling myself, but if you do it, try to do it for the right reason, do it because you made an honest effort and still, life just didn't work the way it is supposed to work, good luck and may the struggles of people like us end in peace, either in life or death. Bye