just make sure your 30 min from your supply then it is just a hope skip and a jump away for the hard core smokers.
I just got back from a two day trip today. I took less than an ounce with me... and I came back home with herb left over. I also smoked out with 5-6 people at a time throughout the weekend.
I'm sure we COULD'VE smoked an ounce if we really put our minds to it... but there was no need. The better the herb, the less you need to smoke.
If you need to carry more than an oz of bud with you for personal use that day... you need to read more of the threads here and learn to grow better herb.