I think it depends on why you're going 8-10 times per day. If this frequency is a matter of comfort/convenience, and you could readily hold it another hour or two at any given time then you should be fine. If you must urgently use the toilet every 90-120 minutes during the day you could find yourself between bathrooms instead of at the bathroom. Why not try this at home, where it's safer, and see how often you *really* must go? You might find the answer extremely liberating. You also may want to inquire about bathroom availability on the particular safari you've selected.
Most J-pouchers can enjoy such adventures happily, and I know I would. Heck, can I fit into your suitcase?