Travel can be a great opportunity to get some new music in your head. When I have to drive or fly I'll often put on a record I've never listened to before, or even a "greatest hits" of an artist I don't normally listen to. You could even make that your "background" music throughout the week while driving around, to really get some of the songs internalized.
When you sit down to play you'll probably have some of the new songs or bass parts in mind already and you can start finding them on the bass. Or it might give you a new idea to explore, or material to transcribe that has some changes you don't normally see in your preferred genre.
Sometimes giving yourself a week away from the instrument can be helpful and give you time to process what you already know or prepare to tackle something brand new. Just remember that your hands and the notes on the bass aren't the thing that's changing, the big developments that make you better are upstairs.
