This week we've been chatting to journalist and travel writer Gretta Schifano, founder of one of our favourite sites for family holiday inspiration, Mums do travel.  Gretta has lived and worked in Italy and Spain and is now based in south-east England with her husband and two children, where she writes for the likes of The Guardian, Independent and National Geographic Traveller. Gretta was recently awarded the BritMums Brilliance in Blogging award for the best travel blog, so we thought we'd pick her brain to get some travel advice  for families planning a long car journey with the children this summer. Top tips...