Welcome to the Las Vegas forum!
I'm not sure if they spell Las Vegas in Mexico with a "Los" but you'll do better in the states using "Las Vegas". So its your first trip? congratulations! whats taken you soo long? just kidding.
I would recommend of of all to pick a hotel on the Las Vegas trip (budget permitting) something like Mandalay Bay or the MGM Mirage both are mid-priced hotel on the strip. We have a good list of the
hotels on the strip (follow link)
A few great attractions off the strip are:
The
Grand Canyon Hoover Dam Valley of Fire Las Vegas Golf Courses Helicopter Tours
Write back if you have any more questions about Las Vegas !