In a YMCA camp (Buxton, Christmas 1949) I learned the following in the "official" singing sessions

Oh show me the way to go home
I'm tired and I want to go to bed
I had a little drink about an hour ago
and it's gone right to my head
Wherever I may roam
on land or sea or foam
you will always hear me singing this song
show me the way to go home.

Followed by a second verse, similar to several above, but with variations

Oh indicate the route to my abode
I'm fatigued and desire to retire
I imbibed some refreshment sixty minutes ago
and it's done right to my cerebellum
wherever I may perambulate
on land or sea or agitated water
you will always hear me humming this melody
indicate the route to my abode.

In the unofficial singing sessions a third verse was learned, similar to Alan's, but with a more Victorian (Oz) flavour

Oh show me the way to go home
said the blonde on St Kilda beach
I lost my togs about an hour ago
and they've floated out of reach
so all I have on now
is sand and sea and foam
so hand me a page of the Sporting Globe *
and show me the way to go home.

At the main Session Bar at the National Folk Festival (every Easter in Canberra) you will probably hear it sung with the 'original' verse repeated as a chorus and reprise.

* a Thursday evening tabloid, printed on coloured newsprint, with only sporting info in it.

Cheers, Rowan