bickley bay sucks in a seabreeze, its a good 10 knots stronger along the shore line than further out due to the wind curving around the island.
as for a good spot... head to salmon bay for your best chance.

having said that rotto is pretty much for competent kiters only but try natural jetty in a strong Easterly if you must.

We kited Salmon bay last Friday on +20kn SW and it was going off!!
Nice flat water on the left corner and a long small right hander point break on the far side. But watch out for the reef on that right hander... I scratched my new board on the dried reef when got too excited surfing a hollow nice looking wave.

By the way... the spot is beautiful!

boat no problem - slow down and take care, often big stinkers in there
have taken in smaller boats many a time, keep to eastern end, skirt around western side of the reef on that side of the reef
only issue if bigger swell 2.5+ bommie may break
good anchorage close in on eastern side, sandy bottom out of the wind
dont lauch kites too close to where stairs are, lots of holes from the headland, just walk a bit further down the beach
i agree wind readings are a hoax, weather station is high up 5-10kn higher reading than beach level