When a group decides to re-supply a field or town, often the re-supply is complete before the last M3s arrive and they get "no objects were re-supplied". It might be nice if those supplies were stockpiled for the next damage done to the field/town. Say, if there are 2 stockpiled supplies and a radar is destroyed, instead of 30 minutes downtime it would be 10 minutes. If there are more stockpiled supplies than needed for the normal time to repair, then downtime would be some nominal "repair crew" time, maybe 1 minute. The number of stockpiled supplies would NOT be known to the enemy, but they could be destroyed by killing the "barracks" (thus making it a bit harder for a single player to pork a field).
A group might even decide to "fortify" a field before using it for an attack to protect against the inevitable porker. Also, eliminating the risk of a useless re-supply trip might encourage more to help out when needed.
kong