Camping St Claire, Neufchatel

Bebo

A bit of advice please.......

We are overnighting here en route to the Loire, we will be leaving on a sunday from the site. 

would it be advisable to fill up with fuel on the motorway or will there be a filling station we can use on the sunday morning before we hitch up and set off? 

Also which is the easier junction to use, the one before or after Neufchatel? I am asking as we will have been travelling for a while and im all for an easy life to find the site!!