harness or carry her.
Ryan LOVES LOVES LOVES LOVES food. He's not so interested in it at the vets. But when we had to go in for a BP study, I needed a way to keep him relaxed and it was just too cold to be outside (vet suggest that when we set up the apt) to do it.
So the vet set up some blankets for us in the OR and I brought in a big nasty disgusting fresh bone. Dangled it in front of Ryan and he followed me right into the vet and down the hall into the OR. He only stopped when the vet was in the room (can't trust the vet to not poke you with something sharp even if you are enjoying a bone... or maybe the vet was trying to steal it).
But I'd go with a harness or carry her in option.
Can you take a different route to the vet (Ryan also managed to figure out when we were almost there and by the time we hit the vets driveway, he knew what was up)?
Does the vet have a little red wagon or something to move larger heavy things around? If so, go in, get that, see the beating thread in SB, beat her to a pulp, put her on it and drag her in.
If they have something like that with wheels, see if you can figure out a way to strap her to it so she won't injure herself when she figures it out and bring her in that way.