- baptize them in the tub myself (against wifes wishes, she wants the ceremony).
Against the Churches wishes as well. This would be highly illicit.
- find an episcopal/presbyterian/methodist/etc. church that will do it without the god parent.
Only if you want to raise your child as episcopalian, presbyterian or methodist. If yoiu want them raised Catholic, they get a Catholic baptism.
- Ssk someone online to be the godparent and have a proxy stand in for them at the ceremony?
Only if you really know the online person and they can fulfill their duties as a Baptism Sponsor.
Technically, you don’t need a baptism sponsor. The code of canon law reads:
Can. 872 Insofar as possible, a person to be baptized is to be given a sponsor who assists an adult in Christian initiation or together with the parents presents an infant for baptism. A sponsor also helps the baptized person to lead a Christian life in keeping with baptism and to fulfill faithfully the obligations inherent in it.
If you really don’t know any other Catholics then I believe you can have the baby baptised without a sponsor and add a sponsor later. Your first step is to speak with the Priest or Deacon who is handling the Baptism and ask for their guidance. Perhaps there are some good and holy people known to them who would be glad to be Sponsors.
If I may stray off the topic for a second, why do you want to get them baptised in the Catholic Church? The reason I ask is that the tone of your posting, along with options (1) and (2), paints a picture of someone who is not deeply in touch with their faith or who fully understands what Baptism does and their obligations as a parent to the child being baptised. I humbly apologize if I have read more into this than there is.
For example, when you say “we wont be here forever in this town and are not very good at keeping in touch with people” - suppose you die the day after the Baptism? Would not you want to know there is someone who will look after the faith of your kids? I don’t care how good you are about keeping in touch, it is your duty and obligation to keep your kids sponsor aware of what is going on in their lives.
May I also point out that asking someone to be a sponsor is not an ulterior motive, it is an honor.