The article below sums up the risks pretty well I believe. I have an extractor but doubt I will ever use it. And if space becomes an issue, I doubt I will carry it. The chances of getting bitten are just too small. On average, 80 people in the US die from lightning strikes each year. The average number of deaths from snake bites in the US is 8-12. There are some 8,000 snakebites in the US every year so a little better than 0.1% of these are fatal and most snake bites are either inflicted on young males whose blood is raging with alcohol along with testosterone or on those that think working at a rattlesnake roundup is a swell idea.

One day, I may step on a rattler and pay the price but given the small odds and the suspect benefits of an extractor, not having an extractor with me isn't going to bother me.

http://health.usnews.com/articles/health/healthday/2008/06/06/with-summer-comes-snake-bites.html