haley, I like all of the work you put in to do a good job, I grew up watching my dad do what you do by necessity. He put a mud hog type axle under a C2 gleaner in the early 90"s, it made a big difference in soft fields but the biggest reason is he converted a 6 Row IH corn head to fit the gleaner and he needed the weight.
I figure your area is flat ? but in southern Illinois on rolling clay hills, the rear wheel assist helps a whole lot with steering, weight distribution, takes a lot of pressure off of the final drives with a loaded hopper, and yes, can get you both stuck and unstuck. I would say if you have it it is worth it.