First, regarding the ladder, I do remember having some discussion here about it prior and one of the memebers said he bought a cheaper version of the same ladder and wished he'd gotten the better one I wound up with. I don't know which is which. Get the more expensive one I guess. Might be up to $100 difference.
Here's a diagram of the rack. If you look at the first link, I originally posted, you'll see the two 180 degree hooks. Those slide up and down and lock onto the bar of your bike. I don't think this rack swings down to let a truck tailgate down. But the bikes come off so fast, you could then just take the pin out and remove the rack. Thule makes some swing out types. Try "swing out bike rack" in the search engine if you want.
I've never had the roof racks where you remove the wheel and lock it into place but suspect they work best if your under 40 and have a lightweight racing bike. The cruiser types bikes most of us use are lighter than days past but probably a two man job to get up and down. Like I said before, we use the bikes a lot more often when they are so quick to get on and off and no rack could be quicker than that Swagman. I stopped using the water proof bag because it took too long to get on and off. I let the bikes get covered with exhaust and rain and wash them off once and while and WD-40 the crap out of everything. I'll let them go bad from the weather and get two new ones in two years. But at least I'll have used the bikes instead of having them under the wrapper. The optional waterproof bag is good for long trips I guess.
http://www.bikerackshops.com/SGXC2Bike.pdf
This diagram shows the handlebars turned. I don't have to turn mine to get them to both fit. You mount them opposite directions.