Dan,
As far as a direct approach Jack is exactly right, but your scenario
requires some thinking outside the box. How about the following. Put the
first month's flurry of tasks in its own Project file, the 10 month slow
roll task in its own file and the last month's flurry in yet a third
file. External links can be used between files to maintain schedule
logic. You could also create a master file with all three inserted
subprojects however you will still face the timeline issue when viewing
the master. At least with three files, a timeline can be chosen that is
best suited for the ongoing activities.
An alternate off the wall approach might be to set up two custom views.
Once with a detail timescale for viewing tasks in the first and last
months and one with a gross timescale for viewing the 10 month period.
There are probably other ways to get there also. It depends on what you
want to see and do or should I say, what you are willing to see and do.
Just some thoughts, brought to you by the guy outside the box

John