Urinary Incontinence Support Group
Urinary incontinence is the involuntary excretion of urine from one's body. It is often temporary, and it almost always results from an underlying medical condition. Stress, functional, and urge incontinence are the most common forms. Share with other support group members and learn from their stories and experiences.
With having a few days before you go you could try to collect 8 of your wet diapers this week and put them in a bag too see if it is something you could manage ok on the hike out .
Maybe in a waterproof bag and in their own pack carrying them out wouldn't be too bad.
If your in an area where campfires are permitted would burning the diapers be an option?
The hanging diapers on the line to try option does not sound like it would be too good unless your comfortable with the rest of the campground seeing them.
Mike
Have you considered reducing the leakage with an external incontinence device? There are several out there that are not ideal, but could help you get by for the trip. Thereafter, you should consider a device that I have written about on this site that is not quite ready for production but is better than any on the market. I'm looking for volunteers to try it and offer feedback that we can use when approaching potential licensees. See my note of 3/29/18, Best wishes. Fynlee.