I agree - we have plenty of Germans in NJ. I work an hour north of McGuire at a company that has a research center in Germany. None of them have particularly complained about NJ.
I can tell you that you are lucky to get McGuire vs many of the more remote AF bases like those out in North and South Dakota. While there is not a ton of stuff within a few minutes of McGuire, a 20-30 minute drive will get you to plenty of shopping and nice towns. You are close to major cities on our East Coast like Philadelphia and New York. You are within driving distance of Washington DC, Baltimore and Boston. Like a pp mentioned, the shore towns are not far either.