Well Billy I guess I can't really help you either on this one because I had both also.
I did have about a month in between my abdominal and my backside because I got an infection in my abdominal incision. I had had abdominal surgery twice before for other things but it did take me awhile to get over this one, in fact, I still have a bruise (?) beside my incision where the infection was and it has been 18 months. Go figure!!!!
You will definitely want to have a pillow to hold on your stomach when you cough, sneeze or laugh. I had terrible pulling sensation on my incision but I think a lot of that was from the infection and you ARE NOT going to have an infection! Okay? They had me on my regular Lortab10/325 but then when they finished and did the backside they also added percocet, too. I know when I got home from the hospital after the abdominal surgery I would prop myself up with a lot of pillows and you will still need to do the "roll" to get out of bed.
Recovery time? Well, I am still recovering unfortunately because I have also not shown fusion and still having sharp pains both in back and stomach. The neurosurgeon did put in an extra screw in the middle of my disc because he was hoping it would help with stabilization since I have osteoporosis really bad, too. The verdict is still out on that one.
Really I think the only thing that will be different for you from your past surgery will be having that pillow near by. I guess when I said I couldn't help you I just had to keep on talking. Maybe someone else will come on that just had the abdominal procedure done and can help you some more.
Keep hanging in there, kid. Everything is going to work out right for you this time.
Linda a.k.a Moma Bear