have you looked in to getting one of those little converter dealies so you can turn your car seat in to a stroller? I don't mean the car seat rack that holds an infant carrier... something like this:
http://www.onestepahead.com/catalog/product.jsp?productId...
if the link doesn't work, its called the gogo kidz travelmate... kind of spendy, but handy if you do a lot of traveling. I think I found mine for a $20-25 bucks cheaper elsewhere on-line, but it is handy.
just my opinion, but I'd rather have my car-seat & stroller with me, esp in vegas...