I know Disney hotels aren’t allowing guest in who aren’t staying there without a dining reservation, but what about Swan and Dolphin? Can we walk from Boardwalk to Swan for Kimonos?
generally, you are fine so long as you use Disney transportation to get there. so if you are on the Boardwalk, you can walk to Kimonos at the Swan - no problem.
In addition to the info above, wanted to note that anyone can enter any Disney resort. You may just not be able to PARK there without a reservation (and even that is hit and miss). You can walk to Yacht/Beach if you'd like or take the Skyliner and visit any of those resorts.