Deck Rail, Cargo Bar, or something else?

Combed through the forums for some ideas and hoping to get some advice and pictures of your setups.

Don't do a lot of heavy hauling, usually some gas cans, cases of water, golf clubs, groceries or stuff like that. Occasionally load it down with straw bales, mulch, etc. I love the idea of the deck rail system because of the versatility and sturdiness. I've attached pictures of the fasteners for my bedcover. Would it even be possible to install the OEM rail and cleats with the bedcover fasteners I have?

I love the idea of the deck rail and would be more likely to haul bikes or larger items, just not sure if it's worth the price for what I need.

Also attached a pic of a cargo bar from Amazon. Anyone using something like that or anything similar? I like the idea of that because of how adjustable it would be and seems it would be less permanent. Also, it definitely wouldn't interfere with my bedcover fasteners.

Any ideas or pics appreciated.