I was one of those people you saw doing that this weekend, but I didn't think it was that long of a walk. If you are not a walker (as a New Yorker I am) yes it will be a walk, but not too bad. When you exit the RP go to your right and keep walking- towards Universal Boulevard. You will have to cut through the landscape, but you will see a small trail already formed on the grass. You will cross one road (not very active) and then another road (that goes nowhere) and then you will be on Universal Boulevard- there is a light right there, just wait for the cars to get the red and you can cross safely. You will now be on the overpass of I-4, walk to the right and you will come upon the entrance ramp to I-4, but there is a light there also, just push the button to cross and wait for the light, now you will be behind Skull Kingdom, keep walking to the corner and you are now on International Drive. To put it in perspective visit the Concierge area and you can see Wet N'Wild and Skull Mountain- and you will see its not that far.