If I had to do it over again I would forget all that messy stuff. Just get a backpack style pressure washer and stick some Velcro on it. Vacuum packed diapers wind up about 4"X6" so you can stick about 9 of them on the washer.

Tear off the old one, pressure wash and rip the tactical diaper off the back using pre-installed Para cord pulls. You will be on your way even in the most shitty urban situation in seconds and be the envy of those soccer moms that spent $$$ lugging around all that junk just to change a diaper.