I have seen folks make weights to go on the bottom of their poles that drop to the ground or run rope down to the weights like you would when you could use stakes. This is especially helpful for when you're on asphalt or concrete and cannot drive a stake into the ground. Others have used empty containers for travelling but fill them up with water to make heavy weights.
In my experience, there's two general manufacturers of bag awnings used by the industry: Dometic and Carefree Of Colorado. There are some other manufacturers. My first PUP had probably an 8' or 9' awning because it was a 10' box. I would say that it was fairly lightweight as far as quality and heft goes. I want to say it was a Dometic. All support legs were loose and the vertical legs came straight down to the ground, not attaching to the PUP body at all. My current PUP has a 14' box and a 13' awning and has a big difference in design and heft. The legs still come straight to the ground but are permanently attached to the front support bar. Only the horizontal supports (three instead of two due to the overall length) are loose. I would say that the perception of quality is higher with this one.
Are they like what you would find on a travel trailer? Nope, not at all. Just remember that whatever weight that is added to the roof, such as a better awning, is weight that the lift system and the person running the crank handle have to deal with.