The wavering economy may have thrill seekers fooled into thinking they can’t afford their dream action-packed vacation, but that might not be the case. Below are Web sites travel experts recommend checking to snag a good deal on an extreme vacation. a new Web site that offers a different unique activity daily in dozens of U.S. cities, such as a kayaking exploration through the La Jolla Ecological Reserve in Sand Diego ($22 vs. $45).  A compilation of government tourism Web sites from around the world, which can be extremely helpful resources for free or cheap and off-the-beaten path activities. Search for family-oriented adventure activities by type and region. An online listing of host farms, homestays, ranches, lodges, B&Bs, backpackers hostels and even sailing boats who invite volunteer helpers to stay with them short-term in exchange for food and accommodation. bike tours on a budget. Find adventure activities by destination, departure date and last minute deals.  Search active vacations by destination and seek assistance from other travelers in community forums. Find free walking and biking trails almost anywhere. A Web site that features short-term ski resort sales from across the globe.