From a Federal perspective the question is are you manipulating food plants? If you are cutting and scattering food plants then you are potentially subject to the baiting regulations. However, if it is cattail and phragmites then I wouldn't worry about it. Clearing landing zones in smartweed or Japanese millet would likely get you a ticket if you scatter seed, cutting cattail heads to camo your blind wouldn't. My suggestion is that you talk to either a state or Federal LE type about your specific situation. The specific Federal regulations are from 50 CFT 20.21.
"Migratory birds on which open seasons are prescribed in this part may be taken by any method except those prohibited in this section. No persons shall take migratory game birds: ...
(i) By the aid of baiting, or on or over any baited area, where a person knows or reasonably should know that the area is or has been baited. However, nothing in this paragraph prohibits:
(1) the taking of any migratory game bird, including waterfowl, coots, and cranes, on or over the following lands or areas that are not otherwise baited areas—
(i) Standing crops or flooded standing crops (including aquatics); standing, flooded, or manipulated natural vegetation; flooded harvested croplands; or lands or areas where seeds or grains have been scattered solely as the result of a normal agricultural planting, harvesting, post-harvest manipulation or normal soil stabilization practice;
(ii) From a blind or other place of concealment camouflaged with natural vegetation;
(iii) From a blind or other place of concealment camouflaged with vegetation from agricultural crops, as long as such camouflaging does not result in the exposing, depositing, distributing or scattering of grain or other feed; or
(iv) Standing or flooded standing agricultural crops where grain is inadvertently scattered solely as a result of a hunter entering or exiting a hunting area, placing decoys, or retrieving downed birds.
(2) The taking of any migratory game bird, except waterfowl, coots and cranes, on or over lands or areas that are not otherwise baited areas, and where grain or other feed has been distributed or scattered solely as the result of manipulation of an agricultural crop or other feed on the land where grown, or solely as the result of a normal agricultural operation."