1. The Tenth Amendment approach on rump-ranging posing as "marriage" would not end the subject. Consult Article IV, Section 1 of the US Constitution (the Full Faith and Credit Clause) for a probable liberal toolbox by which the decision of one state (say Robamney's Taxachusetts) can be imposed on the others. Then check out the text of the Fourteenth Amendment (the most resourceful toolbox ever possessed by liberals and now by social revolutionaries) which requires in its Equal Protection Clause (last clause of Amendment XIV, Section 1) that all persons within a state be provided with "equal protection of the laws." If a pair of Massachusetts rump-rangers pretending to civil "marriage" as allowed by Massachusetts authorities, move to a more sensible place like Alabama or Mississippi and the state to which they move refuses to "recognize" their "marriage," then it is off to court and Alabama or Mississippi can be crushed into line by the lavenders using the fedcourts.
2. Once we start down the Tenth Amendment road, we are in for more trouble. If you consider abortion a "bedroom issue" (I don't know if you do or don't) the Tenth Amendment will mean giving up forever the noble attempt (short of an unlikely actual federal constitutional amendment putting a stop to abortion once and for all without any possibility of "local option"), the attempt to end the holocaust of the unborn. NYC will dominate NY state into retaining abortion "rights" as will Los Angeles and San FranSicko and La Jolla will dominate California and Chicago will dominate Illinois into guaranteeing that the baby-killing operations continue unimpeded. Also Vermont, Maryland, Hawaii, and other states may do likewise. If you can drive or ride from New Hampshire to New York, you will get that abortion. Nevada to California. Missouri, Wisconsin, Indiana, Iowa, North Dakota, South Dakota to Chicago, etc.
Face the fact that we have a federal judiciary that is absolutely run amok, is not effectively checked or balanced by other powers, and, for the sake of this nation's future, needs to be brought to heel.
God bless you and yours!