I've not tried the Sawyer one, it's picaridin in that one I think, I use a permethrin-based one.
Edit: Just spotted your link, that Sawyer one is permethrin-based too, I use the LifeSystems version.
I've heard people recommend putting outdoor clothing in a tumble drier before they wash them to kill any ticks, as they can apparently survive a go in the washing machine! Hardy little *******!
That is a very good idea with the pillow case, will have to try that - it's the near-invisible nymphs you have to be careful with, as apparently they are more likely to carry Lyme Disease.
Sorry to hear about your mate. For anyone interested, here's a video of a girl who documented her own battle with Lyme Disease...