Help please ...We are on our way

We have now booked our ferries for our road trip down through France into torrevieja Spain (dover - calais ) and returning (Santander - Portsmouth ) but as yet have not managed to book any sites as we are unsure about which ones to use .We are planning on doing two stop overs ,1 in Le Mans and 1 in the pyrenes before heading down into Spain .Anyone have any recomendations on any in these areas please

Somebody also posted a Toll free motorhome route but I am now unable to find it so any help there would be grateful thankyou