you can not avoid bouldering you have to face it for some part atleast.
khalti lake is just ahead of gupis, khukush lake is far ahead. its trek starts from langar (near shandur)
stay at right side of the stream and follow it,, you will reach khukush lake in 4 to 5 hours max.
last human settlemet is at barsat. you can take porters and guide from there. you can also hire porters and guide from phandar.
major stops on gilgit shandur road are: gilgit, gakuch, gupis, phandar, barsat, langar, shandur.
follow khukush nalla/ stream from langar.