IT will help a bunch. I insulated a 1/2 inch line for a feed to a mud room. big difference on return temp of water. This line was just thrum the heated basement. The pump is a bit large, the water is returned back to the boiler a little quick.
buy yourself some of the thermometers that use springs to hold to the pipes and watch your temps. You will learn some interesting things.
Unfortunately I just can't go to a wood boiler here. Live on the prairie and wood is in short supply. Have to keep paying the gas man.