Doug - as first timer to The Portal and Whitney, I don't want to be caught without and so, mid-week, is there generally any problem renting a cannister from your store? Permited Wed - Fri in third week of July. What are the approximate internal dimensions of the cannister you provide? One more thing, how do the showers work at the store? coin operated? pay at the counter? how many are there? M & F or just private stalls? thanks for the info.