Re: Thrust driven swing wing
Well as I was suggesting, there isn't all that much extra complexity on a model scale. The transmission can basically be two fishing lines attached to a relatively strong servo toward the tail that's powerful enough to counteract a spring that'll keep the wings straight at 50, 60mph or whatever speed you're going to go to "fully extended". Having wings of a reasonable size would mean a much better glide ratio, even if you don't think drag during the rocket burn on smaller fixed wings will be a problem. I'm not sure how much wind resistance there is at 80,000 feet, but once the rocket has been burning for a couple of seconds I'm pretty sure LOHAN's velocity will be enough for even that rarified atmosphere to start tugging on any sticky-out bits with quite a force.
As for the aileron linkages, any decent model has a seperate servo for each control surface, usually with one for each aileron mounted inside the wing, forward of the aileron. These can be mixed either with a physical onboard mixer or in the transmitter (and presumably in the open source autopilot the SPB team are apparently using). It also allows ailerons to be flaperons (and elevators to be elevons) with a bit of clever mixing. At 9g or less for a decent micro-servo it's not going to be a bother on a craft of LOHAN's, erm, proportions.
Having ailerons would also mean you don't need a V tail, plus I've seen models land safely after losing one of their elevators completely. Little harder, especially for an autopilot, to do that after getting a whole wing torn off.
Also, try and make the autopilot aim straight up half a second second after leaving the platform. Use some kind of umbilical jack lead, or maybe a powerful magnet stuck to two contacts on the aircraft as an easy way to detect a launch. You also get to keep the aircraft's lightweight batteries topped up with something more heavy duty in the launch system that way. Yes, it probably won't give us much additional altitude and yes, there isn't much air up there but it's going to have some effect and it'd still look cool on a camera. Plus it might limit the damage of an odd launch angle.
Last thing, uhm, have you considered apogee detection? I'm sure you'd like to go from burn mode to glide mode in the most efficient way you can.