Why just for the summer? 0W-30 is rated for extreme cold temperatures. You should be running it year round; especially considering that you tow at close to the limit.
And why shouldn't he share his situation on other Tacoma forums? Maybe not every potential Tacoma buyer reads this particular forum. Forums aren't all about feel good stories.
WTF good is a forum that shares the good without the bad viewpoints?
I currently own two vehicles with aluminum hoods. They don't shake. Not one bit. It's not the material, it's the design. Maybe Toyota wants you to feel like your driving a 1969 Mach 1 with the shaker hood scoop.