if you go to touch the nest, put baby powder ALL OVER your hands, it masks your scent, if need be, put a dollop on her nose to confuse her.
DO NOT do this. Firstly, because the doe definitely does not need to be inhaling powder (whether corn starch or talc), and secondly, because it is unnecessary.
I've been breeding rabbits for over 30 years, and from my observation, the vast majority of does could hardly care less if you handle the nest box. If they have a litter in there, they may get anxious and protective about the babies, but you just touching a box is not a problem. If you have been feeding, etc, this rabbit for any length of time at all, she already knows what you smell like, so she isn't worried about you.
Of the hundreds of does I have worked with over the years, I had exactly one deliberately savage her litter after I handled them, but since she did it with subsequent litters in spite of my going to great lengths to avoid disturbing her, she was removed from the breeding program.
Generations ago, perhaps breeders did have to worry about does destroying/abandoning their litters, but the breeder of today is generally much more hands-on, particularly with pet breeds. When a litter is born, you should be able to check the litter in the box, and remove any dead ones that could be a source of infection for the remaining live kits. Baby rabbits will starve to death in 3 days or less, so you need to check the nest every day to make sure all are getting fed.