Am I reading this right I can't transport my gun in a vehicle just to open carry it?
I'm not a lawyer, so all my following responses are a layman's based on the experience of many others. Consult with an attorney on these responses, if you feel you want professional legal confirmation:
Many non-CPL OC'ers transport their lawfully owned handgun in a vehicle just to open carry it. If you don't have a CPL, it is recommended that you not answer officer questions about where you are coming from or going to. Just politely state, "I don't wish to discuss my itinerary, sir." This is because there is a very low, but not non-existent, risk that a rogue officer will wrongly interpret the law as not allowing you to transport between points not on "the list" of examples in the law.
As a non-CPL, there are several laws that you MUST also be familiar with, pertaining to how to legally transport, places that are off-limits (including their parking lots), etc. Based on your asking a very basic question above, I think it's likely you don't know other things you need to know. I would recommend that your first open carry be done by meeting up with an experienced OC'er, following their guidance on the meet-up.
I can't carry open anywhere that has a liquor licence?
Without a CPL, you must have permission to OC from the owner or manager of the licensed establishment. Otherwise, yes it is off-limits. And it includes the entire property of the establishment, including parking lot. Also, note that you should assume that every place that sells any food or beverage (including grocery stores, gas stations, etc.) is liquor licensed unless you find out otherwise.
Their reason was the catch all statement (possible harm or threat to self of someone else) I can't tell you why they said that, cause they won't tell me. Please help.
