Portaging my kayak

I have a slight balance issue and use walking poles. Anyone out there with an idea for a harness from back pack or PFD to kayak that would
allow me to be hands free for my poles. Wondering how to keep the bow from moving forward and backward digging into my back. Any help would be appreciated. I have to portage about 3km.

What sort of kayak? There are rigs out there for short white water kayaks as some of those folks will do some pretty long hike-ins to remote rivers. I can’t see those working for longer boats though. If the terrain allows you are probably better off with a set of wheels.

It seems interesting that a person with balance problem also paddles a kayak. Perhaps you just need to kayak with two boy scouts. Other than that I got nothing because a cart takes at least one hand.