I prefer them taller than 15 feet, although my girlfriend preferes them no higher. I, more time than not, add a boatseat to the seat portion for comfort, it also allows for silent sweveling and add a lapbelt(seatbelt)for security.
I leave them up year around, for two reasons, one is we are hunting hogs in the off season, and they are a pain in the a** to move. This is especially true when I am the only person putting them up...she loves to hunt in them, but not too crazy about putting them up in the heat of summer.
What I do to hide them even better is to cut, Oak Boughs, and using string, electrical tape, and camo duct tape to secure them to the stand. I put a considerable amount in the ground area up to seven feet, careful not to block the rungs. Then a gap, and then again just at the bottom of the foot rest, being careful not to block any shooting lanes.
I purchase the inexpensive stands, mainly from the auction sites. I replace the chain with ratchet straps, most times using the kind that truckers use to secure loads on the flatbeds.
While I use climbers, and hanging stands a lot, I put ladder stands up when I am sure I have found that "sweet spot". They are secure, and silent to get into to. They are the perfect stand to use when hunting close to bedding areas, or other security cover.