Yes, there are family restaurants on Mumbai Surat Hwy 8. Vithal Kamats I saw on the left-hand side somewhere near Manor, NH 8 while driving from Mumbai, but as I had early breakfast, I stopped at McDonald’s situated at Express Mall, NH8, Vapi, Gujarat.
Express Mall is open 24 hours and 150 km approx. from Dahisar (Mumbai), and 100 km from Surat (Gujarat).