As other said, get some brake cleaner. I've always used a liquid based brake cleaner, and made sure to have fresh air/ not breathe the fumes when wiping down. I've never blown the dust with air, but I'd imagine thats not good to breathe that dust. The cleaner will do much much better job than the air will.
Also- NO on ceramic pads. Get the better metallic ones. I am not sure what Oreilly's options are, but metallic will give you a better friction coefficient, at the cost of dust and life. That is fine and what you want. These trucks already have slightly underpowered brakes for their size (especially with all the camping crap).
Also, Autozone has the same or better tool loan program in my area . My local autozone has a 30 day return, the oreilly and pepboys near me has a 3 day. Not sure if this is store dependent tor company. Sometimes it is hard to beat pepboys seemingly always there 25-30% online coupon though for store pickup
For the rotors the only store brand I would buy would be the Napa Gold or Wagner discs. Also, as other said DO NOT get drilled rotors, increased chance of cracking. Slotted technically should give you a little better wet performance on initial bite and also should help with warping slightly, but on these trucks I've never noticed too much difference. Big thing is to get QUALITY rotors and at least decent pads, unless you want to do this job again soon.
Edit- just noticed this is not for your suburban (Again), however I'd think the same would apply. Get good rotors, decent pads. Even with all the above said,since it's a DD and not a big truck/ hauler, I would probably just go with whatever is cheap and on sale for middle grade pads (even if it's ceramic) and decent rotors.