I see all these videos of how to pack a folder for a trip or an S&S coupled bike for a trip, but what about a bike to throw in the trunk of a car? on a train where you don't have to worry about reserving a bike spot?

I have a folder - I have a Bike Friday NWT, but I'm also near the top of the weight limit. Sure, I could order a new Bike Friday with a higher weight limit, but that is $$$ and I can find used S&S coupled bikes for much less. Are they just tricky to get solid tight? The chain stays on, right? You just clip and unclip brake/gear lines and tighten it back up?

Right now if I want to ride my bike out of the city, I have to take our Honda Fit that has non-working AC. We have a Honda Clarity, but a bike can't fit in it well. Even with the Honda Fit, I have to take the front wheel off every time.