question

Adjust the Initialize Travel code to return 3 when the item is "heavy" (whatever that means in your model):

if (te.subnodes.length == 0)
	loadType = 1; // Empty

treenode item = te.subnodes[1];
if (item.Heavy)
	loadType = 3; // Loaded_Heavy
else
	loadType = 2; // Loaded

return loadType;