Question 1: Does God place his name in certain physical locations in regards to the New Covenant observance of the Feast of Tabernacles?
Answer: Under the Old Covenant, a physical covenant, God put His presence in particular places like the tabernacle in the wilderness and the temple in Jerusalem. The place God chose was physical and served as only a type of future spiritual location. Under the New Covenant God does not limit or confine His presence to a particular physical location. His people are His temple (the temple in which the Holy Spirit dwells) and wherever they meet together He is there. This principal is found in the following verse:
“...For where two or three are gathered together in my name, there am I in the midst of them...” [KJV].
Therefore, when observing the Festivals of God it is not a matter of God’s people going to a set location where "God is present", He is already present within his people wherever they assemble together to keep the festivals of God.