well im not too sure and i think its risky because they do investigate any deaths deemed as "unnatural" so even if its frame as an accident, its possible that theyd still conclude that it was suicide
its probably very unlikely but currently nitrogen isnt detectable at autopsy (stated in the ppeh) and that could pass off not as an accident, but maybe as some sudden medical event that caused your death, but for this to happen, someone would have to remove the exit bag + nitrogen tank from the scene, if anyone finds out they did this, they could get done for assisted suicide, but its an option, id also be concerned that if you focus too much on making it look like an accident, then you might be more likely to survive with complications
ik its not really what youre looking for but my perspective is that people are going to be very upset no matter how you die, you cant control how people will grieve, i completely get being worried about this, its something that i am worried about myself, but its not within our control, the only way to avoid this is to stay alive, but then you will die one day and people will be upset, and it might cause you additional suffering, i know suicide has a lot of stigma attached to it, but dead is dead, and people will grieve that no matter how it came about, maybe you could write notes telling people that its not their fault etc to try and help them through it, but ultimately we cant control how people respond
