Trailering a yearling?

I need to work on getting her in and out of the trailer so she will load when she gets there. She is terrible!!! We have tried bribing her with food (she didnt care) we tried to walk her in a circle to get her really close to the trailer then lifted her feet up one at a time ( she flipped out and reared up), we tried to pull her in (she again, reared up and pulled back), we tried pulling her in while people pushed her butt and had a rope on it (reared ect.) then they just started hitting her butt while i pulled (guess what happened)...idk what to do, we need help!