I'll take a shot at 2), using stuff I've culled from web sources. Short answer, only the 2 NG mech brigades that were to fill out the 4th and 5th MDs would have gone through REFORGER.
The Guard had 2 Armored Divisions (49th & 50th), it's hard to see where else they would have gone, other than Europe. In T2k, the 49th stayed around Chicago until it returned to Texas in '98.
Three mech divisions were allocated to Europe, and were deployed in T2k's timeline.
Two armored brigades-- ditto, in T2k, part of the made-up 44th AD.
Two brigades all had roundout positions in divisions that REFORGER-ed. 48th Mech Brigade was to roundout the 24th Mech division, the heavy element of CentCom.
There's also two (or four) ACRs, at least one was allotted to Europe, and in T2k, three of them went.
Also, each of the 9 "leg" infantry divisions of the Guard should have their own tank battalion.
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My Twilight claim to fame: I ran "Allegheny Uprising" at Allegheny College, spring of 1988.
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