3. Reconaissance airplane available at vehicle bases - like the Fi 156 Storch or the Piper L-4 Cub. Taxi out to the dirt field behind the base, takeoff.
While being a popular wish and somewhat tempting, I see gameplay issues.
Attacking Vbases with is difficult enough right now. The defender can already easily spot from tower, sit in wait just listening for the enemy (with an uncanny precision in determining exact bearing & range!) and safely land while on concrete or just ditch if he's not, while anything short of capturing the base is almost an assured "death" for any attacking GV.
I just afraid that spotting planes permanently based at vehicle fields won't exactly encourage attacks...