I have to do a deck that is about 500 sq'...They don't want to see the fasteners if it can be helped. What would you suggest as a hidden fastener. I've looked at the Cameo, Ipe clip fasteners & a few others. I don't know if I get it grooved or use a biscuit joiner. Do I have to worry about water freezing in the groove & cracking the edge of the board.....Any info would be appreciated...