Does following a pacemaker help on marathon race day?

I always check my pace using my Garmin watch.
I'm wondering if following a human pacemaker provides a significant advantage.
My goal for the official half marathon competition scheduled for next week is to break my SB and PB. I'm debating whether to run solo or stick with a pacemaker.
Are there any advantages to this compared to relying on Garmin pace data?
I have never tried following a pacemaker before.
I am curious about what it feels like to follow one.
I also feel like it might provide a big psychological boost.
Also, I noticed there are two pacemakers for each time goal; do the two of them run together?