In relation what you wrote in the other post, look out for the Attends Pull-Ons with 8 drops or higher, same for the Tena variant, choose the "maxi" capacity. I think you can get along without "real" diaper slips at the moment, but you could choose to wear special "period pants" on top of the Pull-Ups, to prevent leaks. They come in different capacities and work well as second layer. I do use something similar for men.
Alternatively there are pants especially to cover up diapers with leak protection, like the adjustforyou(dot)nl, they work very well and cover mostly everything.
"Hiding", do you mean when to rid of them or the time wearing them?
When sleeping somewhere else i do use a one time "changing pad" under the sheets to protect the mattress for leaks.