I don't necessarily know instrumentation either at this point, but this was a stronger beginner group, so my low band may not be so low.

If I were guessing -
-4-6 flutes, half are pretty good
-8-10 clarinets, mostly strong, but not all over the break yet, one will be bass
-6-7 saxes, all pretty strong, i have a bari and two tenors available to them
-4 trumpets, two are gonna struggle a bit
-1 french horn who is probably moving
-2 trombones, one good, one struggling
-1 baritone who is very good
-1 tuba that's okay
-4 percussion, maybe. Wide skill range.