You're right that the strip is fairly long if you look at it from the airport to downtown, but the main part of it where conferences tend to be held is maybe a

You're right that the strip is fairly long if you look at it from the airport to downtown, but the main part of it where conferences tend to be held is maybe a little over a mile long. So I should have said a 20 minute walk. There's definitely an indoor walkway connecting the casinos that at times is underground, at least on the southern end. I remember pre-Covid staying at the Luxor (the pyramid looking one) and the conference was 3 or 4 casinos down and I never actually had to go outside. The underground walkway was full of stores and restaurants.