I totally disagree with the assertion that Anakin or the Skywalkers have to be completely disassociated from the planet Tatooine in a logical PT. In fact, I argue the opposite, and this is coming from someone who has re-written whole screenplays to EPI and II (III seems to be a perpetual work-in-progress). Why I disagree is that I tried every method I could to keep Anakin away from Tatooine and it simply couldn't be done!

The reason is this: Uncle Owen lives on Tatooine as if he has lived there his whole life. In the OT, Owen talks as though he tried to convince Anakin not to leave with Obi-wan on his "damn fool idealistic crusade". Anakin has to be either Owen's blood-brother, step-brother or half-brother for him to be referred to as 'Uncle' by Luke. The only other way is for Owen to simply be a surrogate Uncle, but in any case, he still knew Anakin personally, and possibly even maintained a close friendship with him. An interplanetary relationship on any of these levels is simply not possible for a moisture farmer on Tatooine, so for him to know any of the things he recalled in the OT without Anakin having lived there would be nothing short of amazing.

What I ended up doing with my EPI was to make Anakin a starship mechanic on Tatooine who was friends with Owen Lars. Owen would try to convince Anakin not to leave after Obi-wan finds him and offers to train him; and when Anakin 'dies', Obi-wan brings Luke back to Owen and Beru to care for him as surrogate Uncle and Aunt (sort of like a last duty to a friend).