I see no one has answered and you may have already been by now. However, i went here not knowing anything about cigars and the staff were helpful. I told them i wanted something relatively smooth, not too strong and around about $15-20. I was very happy with their recommendation and had a couple of mojitos to accompany it.

There's an entrance to the forums right off the strip next to the intersection at the vehicle exit from the Mirage. (Beside Rhumbar). Go inside, take the spiral escalator up 1 level. Walk around to the far side (toward mirage) and go down a small straight escalator...casa fuente is at the bottom on your right. Have a mojito for me! It's easy to get lost in the forum shops. It's huge. That is the most direct way into Casa Fuente from the strip.

I did bring my own cigars when I visited Casa Fuente; however, I also purchased multiple cigars from their humidor, a lighter and an ashtray - not to mention the amount spent on drinks. IMHO you can certainly bring your own if you appropriate yourself of their additional amenities.