Like SH, I have 3 rhino roof bars; they are excellent quality, easy to fit and very strong.
I had a roof rack but got p1$$£d off with having so much weight on the roof and not being able to take it off by myself. In addition, the roof bars will be cheaper.
I have a pair of end stops which are fitted upside down to bolt my awning to.
They sometimes come up on fleabay.