She is totally too cute! My Starr also shakes when something is new to her, she is so unlike the other 2 adventurers... I cuddle her and sing very very low in her ear and after a few mintues the shaking stops, try it
Starr also loves her carrier when we got to meetups and she is in her "shakie mood" I leave it open on the floor and she'll jump in it for as long as she needs, she used to go to sleep but now she sits up and checks things out from a place she is familiar (her carrier) which may be her safe haven when away from home. Even at Jodie's when she was little she did this, I didn't realize at the time cause she was new to me, but it is when she is scared she jumps in there.