We just timed this out for ourselves last week - walk from PB to HRH was 15 min (2 adults, walking at our normal, not fast, pace) - walk from HRH to US was another 5 min. Walk from US to IOA is even less than 5 min. It is very comparable to the walk from BWV to MGM for us, which we did just the following day - took us a little under 20 mins.