I think a lawyer is always the better way to go. Like the other poster said, they are familiar with process and procedure - and it's pretty complicated. I know of others who have successfully represented themselves, but I would say they are out of the norm.
There are ways you can save money when using an attorney. The biggest thing, in my opinion, is NOT to call them with every little thing. Post here, or talk with other trusted friends before you call your attorney. A lot of the time, the only thing they can do is listen to you and bill you $200+ bucks an hour for the priviledge. A counselor is cheaper, you know?
Also, you can ask to courier any documents for them (most law firms will charge you around $80), offer to make copies, etc. You can draw up your own
parenting plan and have your attorney check it to make sure it complies with your state laws. Things like that.
There is a great book called "Win Your Child Custody War" (
http://www.amazon.com/Your-Child-Custody-Book-How/dp/1587470845) That has a lot of great information, and is a great way to check and see if something is a game changer (call your attorney) or not (don't call your attorney). The book is pricey - but we found it to be well worth the price.