My only comment is yes to the various approaches. With the limited instrumentation, you need to seize on more than one approach in order to have any variation in your sound from song to song. One song you may do almost all fills and solos. The next song you might do cowboy chord rhythm all the way through. Don't shy away from playing chords for a solo. All you may need is a little clever rhythmic work or some starts and stops. Or let the bass player walk it double time. Don't assume you can't bang away chords for a solo. You can, and you should - on a few songs. Then you may do a rock song with a 5th and 6th string riff. That's fine. Just grab those Chuck Berry double and triple stops during the solo to give it some girth. One thing that might not have been mentioned is abusing something like chord-melody jazz work. If you can do some degree of that, then a few solos based on that type of thing can really be beautiful. You don't have to improvise them. Work them out and put them in the can. You may even find a song or two where it is just the bass playing and you do percussion only on the guitar. That is certainly a way to insert a bass solo and it works well for a lot songs. Good luck. It's a lot of fun.