Digital BW, The Print

It has been a while since I have been out taking photos. Most of my 
experience has been with a 4x5 and primarily interested in 
landscapes, scanning the film and then printing them digitally with 
varoius B&W inks and processes. I am going to be going on a sevral 
month journey to take pictures, but on a motorcycle. This mode of 
transportation has me rethinking my equipment. I an thinking of 
taking a digital camera in lieu of my bulky 4x5. I am concerned about 
image quality and size and am aware that I will loose some important 
camera controls. I would appreciate any thoughts on the use of a 
digital camera and feasability of using one to get respectable prints 
up to 13x19. 

Regards,

Tony