Yes, wrapping your belly can help!
It will of course be harder for your midsection to recover after a c-section vs a vaginal birth, but as you wrap your abdomen from the beginning, it retrains everything as to where it should be. Did your hospital not give you a surgical wrap after your first two? Most hospitals will do that now as they have found that it can help significantly in retaining muscle tone, as it forces them back where they should be instead of just letting gravity help everything hang out. :)
I have only delivered vaginally, but started wrapping after my 5th baby, as after 4 kids in 4 years I definitely had that dreaded mommy pooch that I really didn't like and really didn't want. I saw a definite difference in my midsection recovery after that baby, so I have continued to wrap after my subsequent babies. It really has made a difference for me! It would stand to reason that after 8 babies in 11 years, my abs should be 100percent shot, but between using something to hold it in immediately postpartum and then putting some work into it once I'm cleared to word on my abs again, they looked awesome by the time my 2yr old was less than a year old, and I'm hoping for the same again! (my baby is just 4wks so no big workouts yet)
Someone mentioned ribs spreading, and your hips do too as everything relaxes to accommodate baby. It is possible for all of those things to be narrowed again, even if it isn't to your original pre-pregnancy size.
You can check out Lindsay Brin's website (lindsaybrin.com)-she has had 2 c-sections and shows her recovery pics week-by-week, and by the pictures after her first section (which include abs that most women would envy even before having babies!), you can see that it can be done!
GL!