A Reddit thread included some pictures that purport to be from 7/11/1991 at Battery Park in Burlington, VT.  Trey has the Boogie Mark III Long Head, the (already well-worn) Languedoc 2×12, and a small pedalboard that appears to include at least one Tube Screamer.   The guitar is Blonde No. 1, aka, “Who’s the Mar-Mar?”  The pictures are below.

7-11-1991 Burlington VT 2

7-11-1991 Burlington VT 3

The following pictures are from Amy’s Farm on August 3, 1991 and show a similar rig: