If you're planning to do a channel end hammock, you should triple stitch the channels. It's probably overkill, but better safe than sorry. If you are going to whip the hammock, a single row of stitches is sufficient, since the stitches do not have to carry the load.

There's no reason (other than looks) to use anything else than a single straight stitch on the rolled hems. All commercially sold hammocks I have seen have used single straight stitches on their hems.

With regards to channel end vs. whipped, read this thread: https://www.hammockforums.net/forum/...hipped-and-why
Dream Hammock used to whip very lightweight hammocks because they think that it distributes the weight better. But in the thread SGT Rock wrote that his experience was exactly the opposite. I don't know who's right. If you want to be safe, use a 1.6oz fabric which is more sturdy. A 1.6oz hammock is not an awful lot heavier than a 1.0oz hammock, and as mentioned it provides more support and peace of mind. If you want to stick with a 1.0oz fabric, have a look at the 1.0oz Robic XL (also made and sold by RbtR). It is quite a bit more robust than the 1.0oz HyperD, and it's wider, too.