Federal Land According to this government map, the Imuruk Basin, which includes all land surrounding Graphite One's claim is under the jurisdiction of The Bureau of Land Management.
This is the same dept that has jurisdiction over Alaska's National Petroleum Reserve.
There should be absolutely no issues accessing Graphite One's claim by water.
https://nationalmap.gov/small_scale/printable/images/pdf/fedlands/AK.pdf Sauli