I realized I had been putzing around with my code trying to figure that bug out, and had changed my original attempt (EPSG:32630) to default cartesian. Mistake on my part. I realize I need a projected coord sys conversion vs. geographic.So, now that I've figured out the correct geotools version + JTS version, added the gt-epsg-hsql dependency to maven (in addition to gt-epsg-extension dependency), I've been able to pull in the EPSG:32630, run it against the now-patched bug I was experiencing before - and it seems to work.
My question for you would be: can I use EPSG:32630 planet-wide to perform meters calcs if my source CRS is WGS84? If not, will I have to change the CRS over different areas of the globe, based upon where I want to perform the calc? Is there a "standard EPSG WKT" that most people use for calc'ing meters from WGS84 source for transforms - and if so, can you give me the EPSG ID number?