I live in Maine, and yes your interpretation is correct. However, you cannot have a loadedpistol in a vehicle in Maine without a concealed carry permit. Open carry is fine though. And yes, you can carry in a liquor establishment or restaraunt that serves liquor, as long as it is not posted to restrict firearms. I only remember seeing 2 establishments in Mainethat were posted and they were both bars in Portland, so it is not very common to see restaraunts or barsthat post their premises.