[Closed] Perpignan to Caen Route Recommendations

Will be travelling back from a camping holiday in Perpignan to Caen this summer. Have given ourselves 2 days to get to Caen and have a overnight campsite in Caen prior to an early morning ferry to Portsmouth on day 3.

I was looking for recommendations on routes through France, it looks like the A20 via Limoges or the A75 via Clermont-Ferrand would be the most obvious choices. I wondered if there was much to choose between then in terms of road conditions and tolls?

I'd also be interested in recommendations for mid-way campsites that aren't too far off route ideally with a pool.

Thanks

Dan