Yes you can hop to the other hotels for
swimming or dinning, you can take the boat
from the rpr to citywalk then board the boat to either
of the two hotels. the hardrock is close enough to
walk from the boat dock but the portfino is a bit
of a stroll, 20mins or so. Kids seem to love the pool
at the hardrock but it can get crowded, the portfino
has a nice pool with a slide and waterfall and of all the hotels
it is the least crowded.