How would you 'score' a recon mission?

I was reading Comstar's post about how precamping is the defender's fault and it got me to thinking on some issues with ww2ol combat.

Herein, I believe, lies the fundamental problem with ww2ol:
'How do you replicate the 24 hour presence of permanent combat units on the battlefield in a game with a population that is neither present for 24 hours or restricted to one combat unit AND keep it a fun game to play'

In real life tank columns don't drive right up to the enemies encampment (aka the AB spawn) before the defence is alerted. In fact in real life if there is a large force of tanks / infantry a cpl of hundred meters from your base then your surrendering not rushing out infantry a few at a time to die in a hail of machinegun fire.

In real life you have reconnaissance elements, pickets, units set in defensive positions around the clock. In ww2ol, we have unintelligent EWS, little impetus to perform recon and instaspawn armies. So what can we do?

Well a more perfect solution would have ww2ol combat take place between two prepared enemies that have 80 percent of the forces already spawned into the battlefield but this is simply to unrealistic a goal.

Intelligent EWS would be nice but it completely removes the player from the equation and makes them lazy.

So we come back to my post title 'How would you score a recon mission' or more importantly how do you make it so that players WANT to go on recon missions?