you do NOT need a NJ driver's license to register a car there. however you do need a valid residence or business located in NJ to register a car in NJ.What plates are you going to have on the car during this road trip?
You do realize that you'll need to apply for registration at a physical NJ DMV location before you get NJ plates.
I still think you're going to need a NJ licence to register the car there.
Finally, why don't you call up NV and ask them if denying the state the sales tax is only "tax avoidance" since you don't actually reside in NJ. You can convince yourself of that, but any way you cut it, it's still tax fraud since you are lying about your NJ residence.