As I mentioned elsewhere, ileostomy reversal wasn't too hard for me - so you might be just fine. Also if you have your anal sphincter in-tact and are in decent shape you very well may not have incontinence - most people don't according to my surgeon.
You will wipe frequently, though, so you may want to invest in some flushable wipes for comfort. I like the fragrance-free, hypoallergenic ones they make for kids - Kandoo brand. I also bought the softest Charmin toilet paper. The other thing I recommend after a couple weeks of healing is Metamucil to thicken things up. It really made a difference for me in terms of consolidating the clusters of BMs - sticks the poop together. You'll have to experiment with food, of course, but probably stay away from fibrous fruits and veggies in any quantity for a while. Meats, white bread, pasta, cheese, yogurt, ice cream work for me. Doesn't sound like the healthiest diet ever but I tend to eat mostly veggies, beans, and whole grains unless I try not to.
The thing that I was really focused on in the first couple of days was getting out of the hospital, and they would only let me leave after I had a BM or gas. So make sure you walk a lot. It will help wake up your colon and get things moving. There's no better way. Walk as much as you can and eat at least something on a regular schedule. Eggs with cheese or yogurt, maybe some white toast, were good things for me to start with.
Aug 2012: RC DX Stage IIIC, T3N2M0 by MRI - 38M
Fall 2012: Chemorad
Nov 2012: LAR - Path report: 0/13 LNs, tumor reduced to "microscopic foci"
Jan-Apr 2013: 8 rounds FOLFOX
May 2013: Ileostomy takedown, port removal
July 2013 (and since): NED!