At 65 knots in a PA28-161 you will have some difficulty keeping on the centre line in a gusty crosswind...simply because at that speed with full flap it gets quite vunerable to turbulence and tends to 'wallow' a bit in the air. I would come in with just two stages flap at 70, and slow to 65 as you come over the hedge. No faster though....the tapered wing PA28s when light will float for ages in ground effect.