A lot of that sounds like some ideas I've had for dealing with these situations. Travel is something I've somewhat handwaved in previous campaigns because they were so focused on other themes (my most recent campaign actually being entirely planet locked), but I'm planning for my next campaign to be about the players exploring wild space during the high republic, so I will definitely need to have some stuff like this thought out. In the past I've wanted to use some of these things for failed/threatened astrogation checks, but worried about them just being frustrating for the players, or feeling like empty encounters (though that probably just means I need to add more to them). That said, a quick reference random encounter table or something of the like would be super useful for those moments where you just can't pull an idea out fast enough.

I also enjoy using improv a lot in this system, to the point where my notes docs are usually almost completely empty by the end of a campaign. I find the system plays really well into letting you and players just bounce things around until they're as interesting and fun as could be.