Bears do it in the woods, so we can too - and I agree, it's a little easier than when I had all my parts. Rough camping ideas for tent sight - don't "go where you eat" is for anyone camping. When you are in camp, dig a latrine for that early morning empty. You can by the disposable "potty in a bag" products at any camping store or camping department in places like Walmart. Those are good for trail, kayak, canoe - so you can go without too much bother, they seal well and you can toss it in the fire pit when you're back or, into a garbage receptacle in or out of the trail parking areas. If you don't have the porta/bag, you can find a deadfall to sit on, or learn your body balance/feet stance to empty while standing up. Being mindful of nature and other people is something every "body" has to do while being a good camper. I agree, it's actually harder for me, as a woman to urinate. Squatting while looking out for poison ivy, having to undo my pants - so, if I have to pee too, I'll empty. I will cover with leaves if I don't have a portable toss pouch disposable potty. Using biodegradable toilet tissue, hand sanitizer - you should be good to "go"!
For changing my appliances, I do pack extra with me when leaving home site. Bringing disposable dry fast wipes (I like SafeNSimple) which cleanses well, dries fast and does not affect the new appliance sticking), pre-consruct your new change as much as you can adding the gasket ring already to go and put the no-stick 'lid' back over the appliance package. Bring the supplied product toss bag and you should be able to change without a sink or much hassle. If you do have to do it in front of anyone, you can step to the side or they will have to just love you more than they already do! In various weather conditions with high humidity, having the most portable products is easier. For swimming, and as other's have said - an ostomy belt is helpful. You can get really soft ostomy belts from Hollister. I have peristomal hernia going at all times - and surgery is a waste of time because they just come back - so - I wear a Nu Hope hernia support belt. The belts are covered by those with insurance. But you have to go onto Nu Hope's site and look at their offerings, and call customer service to work with you as you look because it is a bit confusing. I love their breathable belt styles, and you can get your perfect stoma cut size hole and widths. I do the flat panel style, but there are a lot of options. This company even takes 'shape wear' you can buy and send to them to put in an ostomy cut ring into it!
I agree that a belt helps my appliance last longer both home and away. I use the Hollister products with 'floating flange', and the hernia belt takes that feature away, but I am more secure from floppy bag as well as having a longer lasting wear time.
Camp, boat, swim, be in nature - and it'll be just as awesome as ever! We rough camp too, and I'll never give it up! HAVE FUN!