The Hellwig bars will make it nothing but better. I don't know what the rating of the overhead actually is. I've heard about something like "250 pounds occupants" or the like. But that's sleeping. I wouildn't want a couple hundred pounds of "stuff" up there bouncing on the road. But even 100 out of the rear and into the front is a big deal.
Anyhow, Front Hellwig is light enough to be a very easy install. I did something with height, and I forget if that was lower it a little if I'd jacked it to help get under, or jack it a little to be able to pull the OEM bar out and not get caught on some of the steering linkage. But it was EASY!
And except for the weight, the rear was easy too. Lay it on the box it came in (something inside if you want it not to sag but stay at full height, I didn't) and slide it under. OEM bar comes off easily then stick the Hellwig up over the axles and forward. Catch one bolt in an axle bracket and you've got control. From there it's all assembly. Instructions say to put the long front bushing bolts down from the top. That's what I did, but doing it again I'd go up from the bottom and put the nuts on the top end. Would look a little neater. Hellwig's front bar brackets aren't as neat as Roadmaster's, but I've had zero issues. Even went back to check torque on the bolts and they were still tight. If you look at Roadmaster's install instructions for the rear bar and compare the front attachments (sway bar up to chassis rails) the Hellwig brings bigger bushings to bear and I consider their rear bar the better of the two.
Who'd you order from?