I think you don't have as much to worry about as you fear. All the SS people I've dealt with, over many years and several different offices, have been great, and I mean that sincerely.
DW and I have earned nearly identical SS amounts. Since we're not hurting for reloading our Starbucks cards, we both decided to wait until 70 to collect.
I'm about two years older, so when DW turned FRA, we wanted to have her collect spousal on my record while leaving her own to grow. So I needed to file and suspend, and she needed to file the restricted application for spousal only.
I made an appointment for a phone transaction. One fine day SS called to deal with it.
I explained that I wanted to file and suspend so DW could get spousal while keeping her own separate. The very nice lady at SS went through the details with me on the phone, then she threw a curve ball at me. She needed to talk with DW in order to complete the process.
Unfortunately, DW was out having lunch with some friends at the time. The SS agent said that was fine, she would be happy to call DW and handle it with her after hanging up with me.
I gave her DW's cell phone number, then immediately texted DW to tell her to expect a call from an unknown number in a few minutes, and she should definitely answer it because etc., etc.
It all worked out nicely. Very smooth and no hitches.
A couple of years later, I turned 70 and went to the local SS office to start collecting. Fifteen minutes in the waiting room, then 15 minutes with the agent and it was done.
I should mention that at least 12 of the 15 minutes with the agent were spent shooting the bull, since he was a USAF veteran just like me.