Flew the Alouette III 316 and Lama in Iran, about 3000 hours and the 319 in Indonesia. For me it was one of the safest helicopters I have flown, it just oozed confidence. We had over 36 of them and in the 5 years I was in Iran we only had only 2 engine failures, and in one of them the engine was restarted on the ground (an engineer was on board) and returned to base.
We used them for everything including sling, building power lines between 10,000 and 15,000 ft, siesmic, crew changes, offshore and they did not miss a beat. We even had landings on the top of Damavand at 19,000 ft with a passenger who was going to jump off and hang glide back down, plus photo shoots etc.
I have never come across ground resonance mentioned with the Alouette III before and I found the 3 wheels very handy in the mountains for some of the landings on pinnacles with the wheels either side, no place for a skidded aircraft. I have the photo's to prove it!
Those were happy days.