I really like the way your post is laid out - I had a thought about this part of the it:
There's a trick related to this UFO. The words 'segregate and rearrange' are written on the saucer. Using anagram Technics, segregate can be translated to 'easter egg', the words and + rearrange can be anagram'd to near grand ear. Results:
segregate and rearrange
easter egg near grand ear
Must mean something, Grand Ear might be the Big Ear - Big Ear is the huge satellite at Bone Country, San Andreas (GTA SA). Or, another place in San Andreas that is named 'Big Ear'?
I was wondering if there was any other anagrams that could be made out of the last part of the phrase, 'grand ear'?
In particular, is there anything that would correspond to a GTA V place name or street name? For example, 'Granea Rd', 'Negara Rd'...
I had a trawl around the GTA V interactive map that someone had made and couldn't spot anything, but not every street name was listed on it.... Could be a bit of a stretch, but might be worth investigating...