I'm going to Las Vegas for CES next week. I've booked a day off to head towards monument valley to take some photos. I even bought a new bag to carry my camera and other gubbins (lowepro something - my crumpler is good but no space for PSP/DS etc) The camera section in my bag is big enough for my 350d+grip+sigma 10-20, and my 24-105L as well. But should I also pack my 70-300IS? If so it'll need to go in the main compartment which isn't a big deal I'll just need to pad it somehow. I was thinking it wouldn't be needed - landscapes are generally wide angle. But as we'll be driving, and access to some areas might be restricted (its January after all) it might be useful to have some zoom to get in closer to particular areas of interest. Any landscape photographers out there? How often do you find yourself using 100-300m length? Can I save myself some hassle and weight?