Just how big a boy are 'ya? The bridge hammock approach is uber comfy for me, and superb for side sleeping, though not necessarily for full fetal, which you probably can't do. Unless you do make your own and make it with pretty wide spreader bars, maybe 33 or 36 inch or more. Or, if you use a full width pad which helps to sort of "widen" the hammock floor.
The other great thing is that, at least with the JRB BH, it is extremely easy to turn over on either side and even a little bit- sort of- on your belly, due to the stiff top edges. I just brace one arm on one edge and use that for leverage to turn over- hard to describe but the easiest by far of all hammocks. I use these same edges to grip and pull myself up or down in the hammock.
But, the WBBB is just fine for fetal position, and has a lot of room in the shoulders. Each is great and each has it's own set of pros and cons. Enjoy figuring it out, and welcome to the hammock world ( the dark side!) if you decide to join us!