I would not give a pacifier. Your baby might surprise you. My DS always nursed in marathon sessions and comfort nursed a lot. Just like with your baby, I was DS's pacifier. I went back to work when he was 14 weeks old and DH stayed home with him for the next 4 weeks. After that, he went to Grandma's house daily until he was a little over 2. One of the things I was most worried about with him was sleep. How was anyone else going to get him to sleep when he always needed to comfort nurse to sleep for long periods with me?
And yet, Dad was able to get him to nap every single day without DS crying to sleep. Dad tended to pop him in a sling right after bottle nursing and take a short walk to get DS to sleep. Worked very well. At Grandma's house, she rocked him while she gave him a bottle and while it was a little difficult because I had to send a little more milk than he probably needed, it did work out. DS needed to fall asleep with the nipple still in his mouth and if the bottle ran out of milk, he would wake up. Once he had completely drifted off to sleep, she was able to pull the nipple from his mouth and lay him down.
Even after going to preschool, I was worried again. He still needed a bottle-nursing session at Grandma's to nap. But he surprised me again. There was a wonderful preschool teacher for his age group and she sat with him and held him and patted his back to get him to sleep. Yes, he did cry, but he was not alone. And she sat with him every day like that until he was able to just lie on the cot and go to sleep on his own.
So I keep getting surprised. He never needs the same things from other people that he needs from me.
Hope you're able to get something from my rambling. :)