I'm thinking of adding sway bars.., saw some colored blue..., from a vendor (trying to recall who that was...)

These should really help for passing mac trucks in the wind.., I have bilsteins... and they did help.., but I need a little more.., 

I can't think of any draw backs, besides... you have to spend money.., 

So to summarize, to pass mac trucks in the wind.., 

1. bilsteins or koni shocks
2. 15 inch or 16 inch wheel (instead of 14 inch)
3. reinforced tires with the proper load rating with allowed inflation of 43/53, or 30/40, et depending...
4. sway bars
5. bullibars (someone told me their weight [200lbs] made their vanagon more stable)
6. i can't steels wheels vs alloys making a difference.., but who knows??? 
7. i can't see a rear spoiler making a diff, but again??? 
[and Areo's looks nicer than Projectzwo's, recent link posting to posh-whatever-it-was]
8. there used to a wind deflector available for the top front roofline.., but would that do anything???