I'll join the queue advising you not to tow, apart from the added drag, fuel consumption and reduced speed, it is not good for the dinghy.
I lost my first brand new inflatable rib this way - towing overnight in reasonably calm weather, when the light came up, I noticed that I was towing only the D rings from either side of the dink. Boat long gone.
I recommend you to investigate snap davits like these if you don't have room to hoist it onto the foredeck:
I'm not affiliated in any way and don't recommend these above others, but they've worked well with 9ft ribs on my 43' Beneteau and my fathers 36' Hunter.