Hi J.,
I don't think you have to go cold turkey. It sounds like it will be tough on your toddler and physically for you. Especially since you are still nursing her quite a few times a day/night, you may get engorged.
When I decided to wean my son, I cut out his favorite nursing last. Which was the before bed nursing. I was also still nursing him when he would wake up at night, however often that might have been. When I decided to wean and he would wake up at night, I just went into his room, gave him his paci, picked him up and rocked him a bit until he fell back to sleep. Most of the times this worked. Sometimes he'll have a hard time getting back to sleep, and these nights I do believe he is a little hungry so I'll offer him a drink and/or a snack, after that he usually falls back to sleep easily.
Once I was successful at cutting out the middle of the nursing, I never did it again. I believe you have to be consistant or it does send them mixed messages. I waited a few more weeks to cut out the bedtime nursing.
For this nursing I just changed up our routine a little. I had been putting one in place for a few months before I started weaning so he would get the idea it was bedtime. Now we have bathtime, brush teeth, read stories, turn out the light with some soft music in the background, I talk about our day for a few minutes, what we did, played with, etc, and then I sing a few songs to him while rocking with him in the rocking chair. He's lights out and I put him in the crib.
Sometimes, I will offer him a snack after bath if he didn't eat a really big dinner to hopefully avoid him waking up at night. He is not a big milk drinker, so I usually give him a little fruit or yogurt. You could do that to get her over the idea of nursing.
Good luck!