When I go, I don't spend much time at Wiers...If I want to check out the vendors and the bikes and the peoplewatching, I stop by once- get there early in the morning before the drunks crawl back out of thier holes, walk around a bit, and then skeeeeeeedaddle for riding, riding, riding.
I've found the best way in to the beach is to take the train in from either Laconia center of Meredith. Pretty view along the lake, plus you avoid the insanity of the traffic, and no worries about an overheated bike.
If I head up north, it will be the weekend of the 15th. This weekend I'm at the beck and call of my Dance Diva.