I have always wanted to spend my vacation RV'ing around California and it looks like my wish will come true next summer. First of all though, I have to fly over from Scotland, UK to rent my RV ! Question - should I rent in advance or is it safe to wait until I get to the States and spend the first day looking around ? Can anybody recommend a good company (around San Francisco) to rent from. What size do I need ? My family is two adults and three young children. What are the common mistakes ? What should I look out for ? Where are the good campsites ?