Keith used a Fender Strat for standard tuning, too. Check the well-known live DVD from that tour, and you'll see Keith plays Let It Rock (standard tuning) with a Strat.
About Ronnie's slide: have to check it on that DVD, but I think to recall Ronnie playing ADTL with the 3-pickup LP Custom, which is the same guitar he begins the gig and plays @#$%& with (>>>standard tuning)>>> So, if I'm not absolutely wrong (which can perfectly be the case!
) , Woody did play slide on standard tuning too.
[There'll be no wedding today...]