I have mostly asked Sam. Since I arrived in Ukenzagapia, I have received an average of one email per day from Sam, and they are often long since I have usually asked him a bunch of questions. This is pretty extraordinary, I think, since he isn't my advisor. Herb, on the other hand, has sent me just three emails only 1-3 lines each, even in response to a long email when I was having problems finding suitable sites. When I desperately needed to get in touch with Chip for a statistical dilemma, I called one of his grad students to find out his whereabouts and then BCC'd the student on the email to Chip, and got a response from Chip's student but not Chip. Sam came through again that time with a solution.
All that said, there are some things for which I have been afraid to ask for Sam's help for fear that by not already having done said thing he will think less of me (for example, renewing my permits- eek!). I don't have the same kind of anxiety with Herb (maybe because I usually have to try to get Herb to pay attention to me). That fear of disappointment just leads to procrastination which leads to more fear and then more procrastination. A vicious cycle. So, I'm trying to get over that fear and just ask when I need help or advice. The sooner I ask the better, but better late than never.*
* My high school chemistry teacher always preferred "better never late."