Hi, cannot comment on what to see from UK to Italy but my small advice is: besides the standard mainstream locations (Rome, Venice, Florence-marvelous indeed ) take some some time for visiting Marche, the region where Ancona is. It has beautiful villages both on the sea and on the mountains. A real jewel is Urbino, especially this year that they are celebrating the 500 yrs from Raffaello’s – the famous renaissance painter- death.
A little bit of a detour will take you to Genoa, my hometown. I am a bit biased then, but I have to admit that camper sites in that area are usually not the best.
Enjoy