One nice about bumping up in format -- one tends to expose less film, thus less to keep track of!
I use pink anti-static bags -- some ziploc, some padded. I need to resupply...and see what is available for 11x14 holders. I have some great custom-made pouches given to me that each hold an 11x14. Not perfectly dust proof, but I normally have a anti-static brush with me in the field to clean darkslides before putting them in the camera if needed.
Holders are numbered,w/ sides A and B...except the 11x14 where the sides are given distinct numbers. Each image made is recorded, with a goal of developing the film straight out of the holders if possible. Between my 3 formats (5x7, 8x10 and 11x14), I have enough holders to last a week or so on the road without reloading. And usually have my Rolleicord along, too.
When I have had to reload (trips abroad and limited number of holders -- like to Chile), I take note the order the exposed film goes into the box. If the light varied greatly, I'll use separate boxes and divide the film up by SBR (which will determine development concentration/time/temp).