RE: overhunting?
As a rule it is a bad idea to hunt a stand back to back, that being said in depends much on the stand and how you hunt it. If you are painstakingly scent free and hunt only with relatively 'safe' wind directions, and probably more importantly, if your entry/exit is TOTALLY safe from detection you can get away with it. Otherwise you just end up spooking animals. I have one stand like that, the only way in I use is to scale a steep 100 yard high bluff, I have hunted it several days in a row wind permiting and seen lots of deer all season long...but that is the only stand out of a dozen I would do that with.