That sounds like a good trip with no time constraints. I have never flown over to Ibiza, but I have been down to the south of France many times.
Hope the attached French airfield link helps.(It's not mine.) Their are so many nice grass along the way, you are spoilt for choice, although I can recommend Frejus, down by Cannes. It is a 550/600m grass strip that I took an Arrow into.
http://www.google.co.uk/url?sa=t&rct...Xqn3Pj6GsD4EUg
Have a good trip.