So I'm taking my safari dream trip to Tanzania and I thought I could use my "airplane travel bag" for this trip but realized I used it last with my Canon 7D + lenses and it doesn't work for my safari. I've been searching online and might not have a chance to get to a large camera store for a hands-on exploration.I'm wondering if anyone has an idea of what might work. I will have one OM-D w/75-300 & grip+battery holder and another body w/ 12-35 & grip. I'll also take my 60mm macro and 35-100. Lots of memory cards, batteries, remote, possibly flash and other small accessories. I'll be traveling in a jeep but do want a lightweight bag since I'll be taking a small plane into the bush. Possibly room for my iPad. I tend towards backpack type bags...but am open to anything. I need a bag that I can open & close quickly to change lenses and not let dust in. Whew...long list of needs. Thank you for any ideas of what might work.