Can you please clarify the concern with the RTT mounting? Note that in the photo the RTT roof crossbar system is not visible, because the traction boards are bolted to the underside of the RTT, and block it's view. The RTT may appear to be sitting on the traction boards, but it is not, they are just bolted to the bottom side of it.
It is higher than I'd like above the roof, but this is a very sturdy roof rack system that could easily handle twice the weight of the roof tent. The cross-bars and roof rails are all factory VW parts that are made of roughly 2" thick solid machined aluminum. I am a large guy, and can give the car a hard shake/rock from the RTT, and there is zero flex or play. This is hands down the most sturdy roof rack system I have ever had or seen on any vehicle short of the type of systems commercial contractors would use. It has already survived some pretty rough and long duration trips with an RTT on top- Mojave road, etc.
Well, if its as strong as you say, no issues.
What i will say, is that i saw a BRAND NEW (still had paper plates) Rav4 with similiar RTT lose the entire thing, factory roof racks and all, hitting a small drainage swale here in San Diego, about 2 months ago, and i have a blurry cell phone pic on my phone somewhere
RTT, rack, and factory mounts all came off in one piece and landed on the street.
Maybe the angle of your pics are playing tricks on me, but that seems like a ton of stress on those factory rails as it sits.
Also, check Death Valley site for whats open right now.
I was there between Christmas and New Years and a ton of it was closed, and theyve gotten more rain