The version I know from camp has these lyrics, too:

Years go by, 1-2-3
Now they have a family
And every night by the pale moonlight
Sounds like this to me:
Baroomp MAA MAA baroomp MAA MAA baroomp badyadyayyy...

Years go by 4-5-6
Now they have a house of sticks
And every night by the pale moonlight
Sounds like this to me:
Baroomp CRASH BANG baroomp CRASH BANG baroom badadyadyyy...

Years go by 7-8-9
Now they have a party line
And every night by the pale moonlight
Sounds like this to me:
Baroomp YAKYAK baroomp YAKYAK baroomp badyadyayyy...

Years go by 10-11-12
Now they live all by themselves
And every night by the pale moonlight
Sounds like this to me:
Baroomp BOO HOO baroomp BOO HOO baroomp badyadyayy....

Rather a child-centric version! I think my parents were more along the lines of "baroomp YIPPEE!"