I am planning a trip to Northern Arizona and Southern Utah in May, places to visit are the Grand Canyon, Canyon de Chelly, and Monument Valley. This is my first visit to all locations. I would have loved to cram in more but time is constrained, there is more to see on future trips. I shoot mainly 4x5 and 5x7 (leaning toward 5x7 more recently), less frequently 4x10 and 8x10. I will likely take my Canham 5x7/4x5. I will also likely have my Mamiya 7 and (dont tell anyone ) my Canon 20D as backup and for quickie shots. I will do some color (mainly 120/220 but will also have Velvia/Velvia 100/possibly Astia quickloads), but the bulk of my shooting will be in B&W. My usual film is FP4+ which I usually develop in Sprint developer though I have recently been also using Xtol 1:1. I still prefer the Sprint slightly (less contrasty and easier to print, I may need to finetune my Xtol times further). Since I won't have access to a darkroom I may lean more towards 4x5 likely in Quickloads/Readyloads, though I will probably have around 10 5x7 Holders and a changing tent just in case. I may even carry some regular 4x5 holders. So which do people recommend. Acros or Tmax 100? I have used both in the past and still do when convenience trumps cost. I have not formed a definite opinion regarding preference, though I have had slightly better luck following the Sexton method/dilutions with Tmax 100 In Tmax RS. I have also used Xtol 1:1 also for Tmax 100 using Kodak's published times. I develop Acros shot at EI 64-80 in Xtol 1:1 and in Rodinal 1:50. Today I tested Acros coming up with a film speed of EI 80 in Rodinal 1:50 in a Combi tank for 9 1/2 min with 20 sec initial agitation followed by one inversion every 30 sec. I have also shot a film speed test for Acros in Xtol but have yet to develop the film. I hate the infamous Acros "hole" but do love it's reciprocity characteristics. To complicate things further I have acquired a Jobo recently but have yet to set it up. Hopefully it would be set up by the time I make the trip. I know, I should simplify my life and photography but I invariably break down and have both fun and infinite frustration with the technicalities. I also invariably try to take too much gear on a photo trip. Thanks. Sincerely, Hany.