Regarding knots: I tend to forget them if I don't use them for a while.

Regarding the GI Poncho: Carried one for years stuffed in a cargo pocket. It's not a great way to carry the thing, but I can live with it. It's a very useful piece of gear. Though, looking at the prices on 'em online, it's not much more to get a high tech lighter one.

Regarding the Space Pen: The things are nigh indestructible. However, you'll note there's also a pencil on the list as backup. =)

Regarding mosquito repellent: I'm guessing the 95% DEET repellent will do the job on 'em.