Repseki

Are there any tricks to parts to actually hook up inside a cargo bay (the MK2 bays to be more specific)? I can't seem to figure out what can or can't connect to the inside points. This is in Career mode, not super far. Are there any parts that make it easier that I might not have yet? Thanks for any help.

As the title says, is it worth adding parachutes to the lower stages of my Kerbin based rockets, or is it just extra weight for no real return? Mainly I just haven't been able to figure out if the stages I see dropping as the chutes deploy end up getting recovered at the same time I recover whatever is left at the end, or if I haven't been putting enough chutes to slow them down enough. Any clarification on general parachute working in game would probably be helpful is basically what I'm getting at.