G'day Josh. If you are going to try to "talk"
your mate into bringing his telescope along you may want a few accessories. For a start, some way of connecting your camera to where the eyepiece normally goes. The easiest way to do that is with a
T Ring which replaces your lense and a
T-1.25 inch adapter or (better) a
T - 2 inch adapter (assuming his scope will take a 2" adapter) that will slot into the telescope eyepiece holder. If he has a barlow you might even be able to use that to get greater magnification.
I really recommend getting out and practicing if you are going to use a telescope. It is a whole new ball game compared to using a lens.
Good luck with it.