I have done the paddle thing and it just isn't worth it. Your range isn't much better than walking in and your speed is miserably slow if you do decide to make a long paddle. You already have to wake up early enough on public land to not want to paddle an extra hour. You are also severely limited on decoys and forget about bringing an extra person. They also are more dangerous, less stable and not as easy to shoot out of as one would think. I think the stealth boats have a place off a mother ship or covering short distance over deep water, or as a sneak boat/blind in a spot that you don't have to work to get too, but it really isn't going to extend your range and comfort like you think in many applications.
I would do the walk in thing while pinching some pennies and then buy one of these:
http://fourriverslayoutboats.com/t/boatsI have the EBADS but the SOBADs looks nice too.
By far the best duck boat on the water, imo. It is amazingly stable and you can go in miles and has a small profile. I have hunted 3 men and a dog, but two and a dog is comfortable. Only negative is you do need to use a trailer with it, but I have never had a problem finding a spot to back in.
The safety aspect of it can't be overlooked as well. I've busted some thick ice with this too that there is no way you could paddle through.