It is much easier to apply for (and obtain) an F-1 visa at the same consulate that trusted you and issued you a 10 year visitor's visa than it is to file an application to change your status with USCIS in the U.S. Act and plan accordingly.
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Your question is incomplete and unclear. Preliminary, you do not say when you entered the US and how long your were given to stay as a visitor. Second, If you are travelling to Las Vegas and your status is still valid, you do not need to apply for an extension. You only need to file an application if your status is about to expire or you want to change to a different status, such as student. Additionally, if you want to travel and visit while you are a student, you may do so as long as it is during vacations and it does not interfere with your attendance of a full course of study.
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You overcomplicate things. Just live your life and don't misrepresent when dealing with the US Consulate. There is no magic formula and, please, don't expect lawyers to teach you what to say if it's not going to be true. .
Simply put, you should not come to the U.S. on a tourist visa with intent to change to a student visa.
The above is intended only as general information, and does not constitute legal advice. You must speak with an attorney to discuss your individual case.