Ideally - Morris, at least Cotswold Morris, should be performed to a single musician and in the "old days" this was with Pipe & Tabor.
In most environments - the shrill sound of the Pipe is heard over most noises, and the Tabor (drum) also provides a good low sounding beat.
A very good alternative is a Fiddle played with Double Stops (ie. more that one string at a time). Of course the advent of modern Melodeons - eg. Castagnaris, etc.. mean they are much louder than the old Hohner Pockerworks, etc..

I am used to Morris being performed in Oxfordshire villages, and that can make a difference..
I stress that this is only my opinion - but I did dance from age 9 to 62 years...
and still watch a lot of dancing!

Tim Radford