No, but the solution is simple - instead of moving back to Maryland, move to Virginia, Pennsylvania, WV or DE instead.
Everyone is trying to get around the law. Do the right thing and once you get out never come back. If I didn't have ties that I couldn't break right now I would be gone with my business in a heartbeat. Unfortunately I'm stuck here for several more years dealing with this nonsense, but one day I'll be gone and never look back.
under what circumstances will anyone who is in a position to 'check' would new acquisitions be revealed?
How many times have any of us been to the range and had our stuff seized and 'verified' by a govt. agent?
Buy what you want. Just keep your pie hole shut. Most people end up in trouble because they just don't overcome the need to talk.
Again, just use a scintilla of brain power, and there will be no problems. Traffic stop? KEEP YOUR MOUTH SHUT! Your stuff should be in the trunk, out of sight to avoid opportunity thieves anyway. There is plenty of good free info on how to interact with the police on the net. Or you can cry and piss yourself and constantly worry about 'what if', and deny yourself what you want.