Just give it a go and see what you get without guiding.
Try 30sec then 60sec exposures. Watch each frame as they are taken and discard the obviously trailed exposures. You may throw out 50% of your frames but that is OK.
Be realistic about what you want to image. What do you want to do with the final images?
Maybe don't take pretty pic images but try your hand at searching for supernovas, novas etc. These images don't matter as much if they trail.
