i would take smudges advise and try before you buy !! you have to dedicate a lot to a dog even when you dont feel up to it..the dog still needs exersize ect
i would recomend barlow fisheries ...realy good site got ehu nice shower block a little cafe if you cant be bothered to cook and loads of room for kids to play ..
you could be better finding a site near where you live and leaving it there as if you go to a proper storage co ..they will prob want to charge for the year