Yeah, Dan is in the middle of doing inventory so he's not currently taking any orders until after the 19th. If you can hold off, it's worth it, trust me. The quality of his bags is worth the wait IMO. If so, check back with him after the 19th and shoot him a text. He works odd hours, so that might also be why he hasn't been able to answer your calls.
Regarding bags getting dirty, I guess it comes down to where you're playing. The lighter colored bags will most likely get dirtier quicker than the dark, obviously, but after seeing a few sets of the grey bags from sets I've sold, they don't seem to be overly dirty. But again, it comes down to where you're playing.