Boss Steve McKimm is pleased with the start newly-promoted Cray Valley PM have enjoyed to the Isthmian Premier season – but insists he won’t get carried away. McKimm’s Millers sit just outside the play-off places with 13 points from their first eight league fixtures, having been crowned Isthmian South East champions last season. Cray Valley return to league matters at Canvey Island tonight after last weekend’s 3-1 win at Ramsgate in the FA Trophy third qualifying round thanks to a goal from midfielder Matthew Vigor and forward Freddie Parker’s brace. McKimm stuck with most of the squad which e…