edt wrote:nice to be able to hold on to a single line is a great technique but you have to unwrap the bar first otherwise it's too complicated. I always drift launch with wrapped bar because my launches are too sketch to lay out the lines. I would never attach anything to me as I drift launch. Too scary.
Yeah, definitely have to unwrap the lines first.
I suppose I'm advocating doing exactly as the guy in KYLakeKiter's video above, until around 2:50, and at that point, instead of just letting the kite go and hoping for the best, gently hold one of the front lines from the bridle and guide it out as you walk backwards upwind, quickly as he does, and quite a lot sideways as well. Only keep enough pressure on the line to keep the kite in position, not to stop it from drifting.
In this scenario I'd probably also leave the board and come back for it. One less thing to worry about, and a small inconvenience to go back and fetch it. A board drifting over the lines could easy mess things up. Especially a foilboard. I'd only bring the board with me if there was nowhere I could leave it and be able to fetch it from (e.g. too many overhanging trees around).
I'd also add that a drift launch is my last choice, and only if a launch assist is not available and a tethered launch is not feasible. For the OP, I'd also consider the option of tethering the kite to the boat and swimming out with it, though I can't say I've ever tried this.