David,
  I know nothing about "Dr Barker," but I have read in the Town Records
of
Hanover, NH repeated votes during the 1780s forbidding innoculation for
small
pox and providing fines for anyone who did it.
  There was strong opposition to the concept of innoculation and one
needs to
know what Col Trumbull's feelings were on this.
  Since there is always some danger with innoculation (something of
concern to
us today), it might be that the troops, as a whole, were better off as a
result of
the innoculation efforts.

 Regards,
 Homer