First of all, it isn't exactly bribery. Think of it more as reward or incentive. And, yes, I do think that rewards are a very valuable tool to have in your parenting tool belt for getting toddlers to cooperate. You just simply don't have the time for her to realize the natural rewards for potty training vs going to 3rd grade needing the teacher to call mommy to change your pants.
Second, every child is different, and every parent is different, so what worked great for others might bomb with your daughter, and vice versa.
I potty trained 5 kids by using the naked for a weekend method. Choose one weekend to stay home (or in the backyard) and ditch the diapers. Either use thin cotton undies or just have her wear a dress with nothing on underneath, and let her know what you expect. By 2 1/2, it should work fairly easily. Tell her that she MAY NOT go potty on your floor, and if she pees in her dress it will make a big mess. Set up a reward for each time tries, and a bigger reward for each time she pees in the potty. WHEN (not IF) she has an accident, have her help clean it up, change clothes, and wash the soiled ones. It shouldn't be torture, and no guilt or punishment involved, but help her see what an inconvenience it is and how long it takes to clean it all up. For my son, I had to add a dreaded shower to the list to get the point across. By the end of the second day, she ought to be convinced and pretty good at control. Have a party or a fun night and be sure not to go back to diapers after that except for outings. Being naked makes them extra aware of themselves and reduces true accidents when they just forgot, so my son wore nothing but a shirt for almost a full year.
As for pooping in the potty, that can come weeks later or as late as a year later, it depends on the child. Concentrate on peeing in the potty, and if you know what time of day she normally poops, have a diaper on her then. For my son, it was always first thing in the morning, so we waited post-poo to remove the night diaper. If you are still using diapers for nap and bed, she will be able to "hold it" until she has a diaper on if she doesn't want to go on the potty. When she begins preschool, she probably just won't poop at school.
Be sure not to get into a power struggle or try to force her to do something because you WILL lose! Potty training is one time parents rarely win the fight. One of the kids I potty trained absolutely refused to go without a diaper or to sit on the potty, so I "ran out" of diapers one day (and conveniently found one at bed time), so we had no other choice. He didn't view this as forcing him. I also had his big sister (who he adored) "show" him how the potty chair worked privately. He felt like is wasn't something I was trying to get him to do, but a cool thing that made him more like sissy.
Good luck