1. To get home during the storm was quite difficult.

Question

To get home during the storm - phrase
function; direct object

2. Our plan was to reach southern Maine by noon.
To reach southern Maine by noon - phrase
Function; adverb

3.She was told to reorganize her composition.
To reorganize her composition - PHRASE
function; adverb

4. The person to ask about that is James.
To ask about that - phrase
function; adjective

5. They want to wait another week before acting.
To wait another week - phrase
function; object of prep

Answer 1

To get home during the storm - phrase - yes
function; direct object - no

To reach southern Maine by noon - phrase - yes
Function; adverb - no

To reorganize her composition - PHRASE - yes
function; adverb - no

To wait another week - phrase - yes
function; object of prep - no

In addition to the site I posted for you -- here's another that will help you determine the functions of infinitives.

http://www.chompchomp.com/terms/infinitivephrase.htm