Absolutely....
What I usually do (not saying this is the way it should be done) :
On arrival at the site, I talk to the pilot who has been there before (if applicable), and/or create a little exel spreadsheet with weights/altitude/temperature and range limitations...
This gives me a rough idea already....
In addition to that, I do my "checks" before going into the LZ as stated above.... And of course, on the Bell mediums at least, doing a power assurance check on a daily basis as a trend monitoring... We did not have an engineer on site for a while, hence it is even more important to know your aircraft....
Since my military flying days I made it a habit to always Brief myself (or the copilot if there is any) on the aircraft weight before each approach or departure as well (and the fuel status, and the altitude... And the density altitude.... And the temperature... And and and...).