Currently 55ish been playing with trains since I was 12 first in HO. Got an LGB bobber caboose in the late 80's then an aster live steam climax to pull it...lots of fun!
Dan, I live in the desert and the fleet still grew. Almost every night elves would sneak in and leave more trains. Not sure if rain really affects it.I started in 1999 with a LGB 30th anniversary set (a Birthday gift).
Like the plants in my garden, every time it rains my fleet grows and grows. (I should have lived in a desert)