RE: Attaching Velcro around skylight
BTDT on two different campers. I ended up using a good contact cement to get
the Velcro to stay.  It's also possible that the Industrial Strength Velcro
would adhere better than the standard issue stuff.  You can find the
Industrial Strength at places like Lowes if you look for it.  But not only
is the stickum much stronger, so is the adhesion of the Velcro itself.