No. You can wrap a whole package in a block:

{
    package HTML::Strip;
    ... rest of HTML/Strip.pm goes here
  
}
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The two things you need to look out for is __END__ blocks or __DATA__ blocks in the modules, and "unclosed" POD sections. You need to close the POD sections and remove everything from __END__ or __DATA__ onwards because Perl stops reading the file at these locations too.

So if you have an example file HTML/Strip.pm

package HTML::Strip;

sub pole_slide {
    ...
};

1;
__END__

=head1 NAME

HTML::Strip

=cut
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... you'd include the following in your main program:

package HTML::Strip;

sub pole_slide {
    ...
};

1;

package main;
# use HTML::Strip;
BEGIN { HTML::Strip->import() };

# rest of your main program goes here
[download]

This is a slightly different approach than what App::Fatpacker uses, and it requires a bit more human judgement, but it involves much less Perl internals and you'll learn a bit about how packages and modules interact.