Las Vegas is an extremely hot place in the summer so do carry sun blocks, moisturizers, goggles, caps, light cotton clothes and swimwear if you plan coming here in this season.Carry an extra baggage if you plan to shop around as buying one there could cost you a lot more. Get your camera along as there are several opportunities to get some nice pictures. At night it might get a little cold so it would be best to carry along at least one pair of warm clothes. If you use any electric stuff do carry an adaptor as it could come handy. Get formal or semi-formal clothes if you plan visiting the casinos. Always carry water while traveling as the heat can cause dehydration. A pair of comfortable walking shoes would help while walking around in the city. One can wear any outfit here as it is a modern city and accepts whatever is worn by the people. Get your credit cards and plenty of currency but beware while playing at the casinos as one can lose money as well.