After you have destroyed the four trucks, you'll move up the street and come to a barricade (red and white stripes). Stand close to the striped barriers to recon the area. Do not go past them otherwise you'll not be able to get back.
2. Kloosterdreef 88mm
Once you've destroyed the first gun emplacement as part of your objective, the recon point is close by. Stand between the green hut (on your right) and some empty crates on your left, facing towards the destroyed gun. If you've got all of the recon points thus far, this one will net you the Recon Bronze achievement.
Kilroys 3/3
1. Once you've entered the church and reached the 1st floor (that's above the ground floor where you entered) you'll make your way to the back of the church. On route you'll come across some wooden planks used as walkways. On the very first walkway you'll come across, there are alcoves on the left hand side once you've crossed over. From the first walkway the Kilroy is in the second alcove on your left.
2. Once you've moved past the barricade and completed the objective Destroy the German Fuel Supply, you'll enter a garden area (allotment). You'll have several Germans dug in as well as a MG gunner in a nearby window on the top floor of a building. As soon as you enter this area simply follow the path south bound and as the path heads west you'll see the Kilroy on the wall as the path bends.
3. Once you move up the street from the first gun you destroyed as part of your objective, you'll face heavy resistance. You'll come to a building with green canopies on your right. Almost directly opposite this building on the left hand side is building with striped (black and white) canopies over the windows. To the side of this building there's a route you can take heading west. Go round the back of the building jump over the wall and in the next garden you'll see a Lager Bier poster. The Kilroy is next to this. This should unlock the Kilroy Bronze achievement if you've collected them all thus far.