For a First Aid Kit, I'd take a look at some of the small kits they use for backpacking to get some idea of what is included in them. Even HD makes two different kits now. I can't remember the brand, but there is a small air compressor that is about the size of two packs of cigarettes that is supposed to work well, and it's not very expensive either. Small LED flashlights that hold a couple of AA batteries, or three AAA's work well and are dependable...put out a surprising amount of light as well. The thing about spare fuel is having a container that will not leak...at least consider one of the SIGG aluminum bottles that hold fuel for hiking stoves...they are well made, won't leak, and durable. The round bottle makes it easy to stuff them in a corner/crevice without worrying about crushing. Jumper cables...I'm sure someone makes some especially for bikes, otherwise I'd just go get some 6 or so gauge stranded wire, 4 alligator clips, and make me a set. Don't forget some tire plugs, or a kit that has them.
You've got a couple of nice trips on the horizon...have fun and be safe!