Ya'll are way over thinking this! Just dig a pit a couple of feet deep and about 4x4 10-15-20 ft from your RV/ Cabin, etc.. Buy a joint or two of thin wall PVC pipe from Home Repo and extend it from the discharge to the pit. Make sure you have a little fall in the pipe from the discharge to the pit and insert the flex hose in the end of the pipe (I use baling wire to secure it in place when the brown nuggets start flowing). Throw a couple of pieces of tin over the top of the pit so no one can watch the brown trout swimming and put a hog panel around the pit to keep you or your buddies from taking a swim. You're done, now back to relaxing, hunting and telling a few lies around the campfire.
I don't suggest growing any Romaine lettuce or anything around the pit but the grass will always be green around it