Wetlands determination

[youmyboyblue]

Looking to acquire some acreage near my home for a future home site. Received all the disclosures from sellers agent and it is marked as no wetlands. So I proceeded with sale, yesterday while showing a mud/clearing guy the site, he recommended I get a full wetlands report because of some vegetation he saw. I still have 12 days remaining in my inspection period. I have read all I can read and still can't find clarity. In worse case of wetlands, In once instance I read I could get a general national permit-no problem, another section talks about buying credits from farmers and another section talks about exemptions.
Has anyone had any experience with this?
It's a 15 acre tract that appears high hardwoods from visiul minus a little river that runs the back end of property. I was able to locate a soil map and it appears the soil is much Aa, some Bg and some Gy. However those acronyms do little for my understanding. Is there a company you hire for this or do I go straight to the corp of engineers? Any info would be appreciated.