Never mind the metal detectors; if I were packing that much iron, I'd detour to avoid deep bodies of water!
At one point, in a previous life, I routinely packed a pair of S&W M19s (a 4" and a 2.5"), 2 pairs of handcuffs, a hideout .380 auto and at least one strong, sharp folding knife, in addition to a walkie-talkie and body armor! No wonder my back hurts, today!
Ahhh, civvie life is great; one primary and one BUG. Now, the other extreme (no CCW for the serfs) was a worse bummer, till my home state followed TX and FL into "Shall Issue Land."