I have to say, I'm really not sure of anything that's going on, and for a mystery, that really bugs me. I like when a mystery leaves you clues so you can play along. This show has not.
I'm not sure the guy at the roadside was Wakefield though. They have an actor, they could have deaged him (he looked younger on BSG thatn he did in the photos on Harper's Island). That they didn't show his face makes me suspricious that it was Wakefield.
All in all, it's a fairly entertaining show, and the fact that it's 13 episodes is good. I just hope they don't do something stupid, like try to carry it on past 13 episodes, or throw in a stupid cliffhanger or something.