I run the PIAA halogen fog light inside the holes on the Aluminess front bumper and spliced a pair of PIAA LED driving lights into each of the Halogens wiring harness - they all come on the same time with one toggle in the cab. Contacted PIAA Tech support prior to confirm the amp and/or watt draw would be OK and they validated it wasn't going to be an issue (and in 5 years of use, havent had any problems). I use them all the time on pavement (but then PIAA's are DOT compliant so beam pattern allows for this), ***We do a lot of freeway traveling at night, or real early in the morning.
With the proper wire size you can come off the battery with power for all, and then branch off where needed (or convenient). Recommend a fuse in-line on each.
And, from what you described for placement, I would install a separate switch for each set if you are planning to also use them on the road (since the higher mount on the a-pillars may present a problem to other drivers).