For many Americans, vacations are more than just some time away from work.  Three out of four respondents in a Spring Hill Suites poll say vacations are important for their mental health.  Nearly 45-percent are looking to their vacation as a way to alleviate stress, and 37-percent are hoping it will help rejuvenate their spirit.  The majority won't be letting money get in the way of their plans, either, with 60-percent saying they'll hit the road regardless of the current gas prices.  However, that doesn't mean people aren't concerned about the cost of their trip.  Nearly two-thirds of the women and 41-percent of the men admit they feel guilty about spending money while on vacation.