There's a reason boats are welded these days. Glued seams are an art -- they are perhaps more forgiving than the one-time-only hand feeding material into a welder, which, if you blow it, hoses your curvature or symmetry.
But older glued seam boats were often segmented so as not to deal with a single full-length seam. Prep work must be exceptional. 2-part stabond only.
Once the tube is roughly assembled and valved and all, you can put it on pressure and use a heat gun to massage smooth seams around your curves.
Talking to guys at sotar, different colors weld differently. mix d rings and base fabric, the combo of colors dictates the weld.
The folks I know who have done this start with small models to figure out the rough pattern ratios. Then they build mockups in lighter material to get a handle for the technique.
I've always wanted to build a set, but doubt my ability. If you go for it, please share! Best of luck.