There are a couple great quilt shops in Las Vegas. We go to LV about 3 times a year since we have 2 time-shares there and also the Mountain West Basketball tournament is held there and both my DH and DD attend all the games so I take the car and go see what is new.
Have thought about taking the tour it sounds like fun being with a group of quilters for a day. So far, too cheap to do it since I have my car there - but it does sound like fun.
We don't have Hancock Fabrics in San Diego, so I usually go there (there are 2) - they are okay - but they are rather old and run down. The quilt shops on the tour are more fun. The Fabric Boutique is right next door to a WallMart - it does not have a fabric department, so don't waste your time going to that WallMart. There are other WallMarts and one does have fabric, just can't remember which one. Since we have Joann's here in San Diego I have not gone to the ones in Las Vegas or Henderson.
The fabric prices vary, I really don't remember them being out of the ordinary - but San Diego can be a bit pricey compared to the rest of the US but much cheaper than in the UK.
Hope she has a grand time!