I would recommend fiberglass blown in insulation rather than cellulose because it is not conducive to insects.
Attic walkway over insulation.
If you displace insulation in order to move around in the attic don t forget to put it back as you leave.
Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in.
Walk to one end of the attic by carefully stepping only on the wooden ceiling joists.
You could also lightly spray for insects over fiberglass if needed.
The trail you leave in the attic can easily end up tracing a path on the ceiling below.
Place a 2 inch by 3 inch board directly on top of the joist nearest to the edge of the attic with its largest.
Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing.
If you can make the walkway 2 wide it most likely would not be necessary.