I will merely echo what workinmom said. I am somewhat in the same boat. I am Catholic, but not very observant for a number of reasons.
But, I baptized my kids as a gift to them. It is easy to follow these small rituals now. It gives them a base and church even if you don't go. It is actually a very moving ceremony about bringing babies into the adult world, celebrating their humanity, and an affirmation that the parents and community will protect them and teach them. Depending on your religion, this small step will ensure that your kid has a church home no matter whether you are or are not ever observant. Then, if as a young adult or adult, they decide to be observant, they do not have to start from square one and take 2 years of classes (or whatever that sect requires) to become a part of the community. Christian baptism is often recognized between many churches too, so it is not like you are tying them to a particular faith or church.
I commend you for not wanting to join just for this purpose, but perhaps if you looked at it from the childs' perspective 18 years from now, instead of your perspective now, it will look different. That is why I take my daughter to first communion classes every week. She has fun, she is doing it with her pals, it teaches good things, and it will make her life a whole lot easier when she is older, especially, for instance, if she wants to get married in the church. Or she can bag the whole thing. Her choice...but at least she will have an easier choice to make then.
When you are feeling pressured it is such a natural reflex to say no. But in a whole lot of ways it is good to get it done. Here's another way to look at it. I'm assuming that since you are away from the church it means that you are baptized and simply choose not to be observant. That is a great benefit to you because you can be observant if you want to...on holidays or if you decide you want to keep going. By baptizing the kids, you are just giving them the same options that your mom gave you.
Good luck either way!! Truly, I feel your pain on this one. Been there.