Jim, KØNK, shares his experience with portable operations along with some great suggestions on the equipment you might need to enjoy Ham Radio in the field. Here are the links to the article and video's that Jim references in his presentation.
K8MRD, Youtube:
Which Antenna is Better? 49:1 EFHW VS 9:1 Random Wire
What Do You Really NEED For Portable Ham Radio Operations?
Craig Sullivan, printed article:
Comparing HF Portable Transceivers: Xiegu G-90 , X6100 , X6200 , Guohe