I use gaff panties I get on line from Enfemmestyle, one of our supporters here at CDH.
The trick is sizing. I find I need panties that are a bit larger than what EFS recommends.
They have quite a few different types. I tried two or three before settling on one size and style.
I actually find tucking to be somewhat pleasurable; it reminds me that I’m dressed as who I want to be.
Also a gaff panty allows one to sit down and do ones business in the Ladies room.
It does take a bit of practice to get the “Equipment” tucked back up and in place, but once done it presents a nice flat surface so I can wear those bodycon tight dresses and skirts without worries.
There also is a company out in California selling Tucking Tape strips I hear work well. PM me if you want the specifics.