strmchzr,
There are plenty of experts with practical experience that will chime in on this one, but since I have recently been exposed to another couple of facets of wetlands, allow me to share a couple of thoughts. The NRCS div of the USDA is VERY interested in anything related to promoting wetlands, whether it be creation, maintainance, or improvement. You may already be well aware of this, so you will also know that they will cost-share it's creation and offer engineering assistance. There may be a flip-side to this, though. Once a wetland is established. they are also very interested to make sure that it is not destroyed or compromised. At this point, I don't fully know the legalitites, but I do know that if there is ever any plans to make negative changes to this wetland that you are about to create, there may be mitigation later. At 4 - 6 acres, it will likely be picked up eventually whether you contact the NRCS or not, so make sure that you understand the potential ramifications down the road...and...please share your findings.
