I am very new to astrophotography and have imaged with my dslr (300mm) for the past yeAR. For better results I would like the option to auto guide and dither. $ issues don't allow me to purchase any new equipment so I was wondering if it could be possible to autoguide with another dslr as opposed to buying a separate cmos/ccd camera. If that is possible, would ekos/indi support this? Thanks!

I think in principle you could though I never tried it myself, and due to slow download times it might not be suitable for guiding. I'm not sure how GPhoto handles two cameras though, the current driver only controls one.