<<there is a form I can get that will allow me to apply for permission to conduct such a flight.>>
You may already be aware, but some pilots are not - the NSF approval is subject to traffic and other factors at the time. On the day you have to telephone the ATC Unit to see if the operation is feasible and you may well be given the OK in principle. However, ultimately it's the controller working the sector who makes the final decision. Anyway, enjoy yourself!!