Updating with what we learned about the SLO fly after our 3 week adventure. We ordered it with 6 vents and while I worked feverishly on my truck to prepare for the trip, my lovely wife had the task of seam sealing it. There was some confusion on which side to seam seal, so with the hot Texas sun around to help out the process, we did both sides. We draped it over the 84 4Runner and my wife went to town.
As others have stated, install the poles beforehand. We also "gather the poles" when taking down the fly and that helps to package it up and get it in the bag with ease.
Deploying the fly for the first time is much like the old FRP fly. Depending on your setup, after your first deployment, you will know how you want your straps arranged. I used the supplied and extra straps for this trip, but will be moving to some sort of quicker tie down system in the future. Feeding the loose end of the strap through the buckle every time slows down the setup process.
On my Tacoma, I have two straps on the front corners. Tie these together loosely and put the tied ends under the flippac support bars on the roof. That will "drag" the fly over the top when you open the flippac. Velcro on the lid and the fly would work too.
Finally, use something to differentiate the front from the back (if you have left the straps on and they are side specific for your application). I might just put some colored electrical tape around the front straps for now.
It never rained, but we put the fly on about 15 times over the last week. It worked great for keeping in the warmth, and the windows were a nice addition.