yea i have the same problem. i use to buy half oz's and go through it with in about a week. and its really a problem when you spend money for food on weed. i use to this all the time but i finally kicked that habit. now all i buy is an 1/8 a week.
i had to get mine pulled a few years back so i thought the same thing. why not do a few bong hits before i go? well in my experience it was one ofe the worst experieces i have ever had with weed. just the sound of metel in my mouth messed me up.
Re: Elevation??
ya i live at about 6000 feet and when i go to western oregon to visit my family wich is at about 200 feet i have always noticed my bud burns slower.