There are many walkways within the resort one wrong turn and you can walk an additional 10 minutes... in the end your question is hard to answer.. from congress park, springs and Paddock it is not a bad walk for me at least... the rest I can not speak for but will say from these areas 5 minutes to 15 should you take the correct path... the rest of the areas would add to the walk. My suggestion is follow the bike trail to congress park then need to walk near the building -parking lots- that would be the fastest way I have come up with.... BUT take the boat as well it is very nice short ride.. the boat only services SSR and will go to the Tree houses only when someone is waiting (radioed from POR boat) or someone gets on at DS.