I don't think it matters if you were married in Vegas, Mexico, or a big cathedral, you are either married, or you're not.
Some state's have common law marriages, some do not. If you weren't married by an ordained minister, justice of the peace, etc., then either party may have grounds to contest they were actually married. Once marriage is established you are; otherwise you're not.
Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, and Washington are community property states. That means that if you are married, your spouse is considered to have earned 1/2 of your income and you are considered to have earned 1/2 of their income. If your spouse is unemployed, then she gets 1/2 of your income and you get nothing. Purchases (TV, computer, guns, etc.) made during the marriage are 1/2 hers and 1/2 yours unless they are a gift (the $2500 ring you gave her is hers alone; the $14 sweatshirt she gave you is yours to keep).
A home purchased during the marriage is 1/2 each, regardless of who actually pays the mortgage. For a home purchased before the marriage, equity accrued during the marriage is shared. Like gifts, inheritence is not subject to community property. If you inherit anything, keep that money separate. E.g., separate accounts, track and document the source of funds. Keep the interest or income for your separate assets separate. If you comingle your separate and community property, you have just given her 1/2 of what you had before the marriage.
Most important, posession is not 9/10th, but 10 tenths of the law. If you get kicked out of your own home and she has posession of the guns, furniture, etc. she can steal your half and get away with it. If you have guns given you by your father or gransfather when you were 11 years old and they are now dead, how are you going to prove you had them for 20 years before you were married?
My point is even your separate property acquired before marriage is not protected during a divorce in a community property state unless you have a prenuptual. Even then, some women become greedy and will do and say anything to get as much as possible.
Good luck.