Report Page Width With Dynamic Columns Through Parameters

I found the following paragraph while searching on here:

************************************************************************
You could easily set up a parameter for each column and then display that column conditionally based on the parameter.

For instance, if you have a column that displays First Name, you could have a parameter called DisplayFirstName. Then in design view you'd select the whole FirstName column and in the Visibility-Hidden property set it to :

=iif( Parameters!DisplayFirstName.Value = false, true, false )

This could easily become a big, unwieldy report, though, if you have a great number of dynamic columns. Also, The width of the report is set at design time, and it includes the width of all your columns, not just the visible ones. This could cause you some pagination problems.
************************************************************************

That is exactly my problem. I have lots of dynamic columns which causes the width of the report to be wide. Thus even though at run time the report only shows columns within a page, the report itself consists of a lot of white spaces after the selected columns. Does anyone know a solution to this? If not, I guess creating the rdl with code manually is the only way? Please advise. Thanks in advance.

- Will