Broadheads should be just fine straigt out the package.
Unless you bought it from clearance and can be +1 year old. Then. Ight use a light touch up.
As for the tree stand, sooner the better,
Usually best 3-4 prior to season.
But putting it up now you should be good by end of septmeber.
Hunt your first stand early, then use this stand later.
As other stated put it up when minimal movement is out, and block that scent.
Epecting rain, purt it up just before it rains to help wash out some of the scent.