X2!
In the salt usually you need to bring bigger and more equipment that may not fit the over the counter rod holders very well, I think that's where the PVC rigs were started for float tubing the salt.
I know my buddy has had a simple PVC setup that carries 4 rods he created intitially for the salt but he's a nut when it comes to bringing too much gear with him. Depends on your target species or if you plan on targeting multiple species at once, if you are after trout or cat do you really need that elaborate of a setup?
Really simplicity is what attracted me to float tubing, blow up the tube strap on a rod holder or 2 and go. Some of these designs mean more setup time and a lot more stuff to bring with you out to the lake, just something to think about.
I use a BPS type holder and a 3rd grip strapped on the same side. I don't like a bunch of stuff hanging off my right side cause I do a lot of fly fishing and the more crap to tangle with can really suck.
I am very impressed with some of the rigs but if you aren't carrying a fish finder (you can also get a strap on holder for a fish finder), don't want to film using a Go Pro mount etc.. do you really need an elaborate setup?