Here’s an 8-day nature retreat plan in the USA, focusing on hiking, kayaking, wine drinking, and rest on Day 5, all in a moderately priced area with private airport transfers.
Day 1: Arrival in Asheville, North Carolina

• Private transfer from Asheville Regional Airport to your accommodation in the heart of the Blue Ridge Mountains.
• Settle into a cozy, nature-centric cabin or boutique hotel.
• Evening: Explore Asheville’s vibrant downtown, known for local breweries and farm-to-table restaurants. Enjoy a relaxing dinner with local wine at one of Asheville’s acclaimed restaurants.

Day 2: Hiking in the Blue Ridge Mountains

• Morning: Head out for a guided hiking tour along the scenic Graveyard Fields Trail, offering waterfalls and panoramic mountain views.
• Afternoon: Enjoy a packed picnic in the mountains.
• Evening: Relax and unwind back at your accommodation. Dinner with locally sourced food and a glass of local wine.

Day 3: Kayaking and Water Activities

• Morning: Private transfer to Lake Lure or Nantahala River for a kayaking adventure. Paddle through the crystal-clear waters surrounded by lush forests and mountains.
• Afternoon: Continue exploring nearby trails or take a boat tour of the lake.
• Evening: Return to Asheville for dinner, and enjoy a wine tasting at a nearby vineyard or wine bar.

Day 4: Exploring the Great Smoky Mountains

• Morning: Private transfer to Great Smoky Mountains National Park. Go on a hike, such as the Alum Cave Trail, known for its incredible views and rock formations.
• Afternoon: Picnic and relaxation at the park.
• Evening: Dinner at a mountain lodge with views and local wine selection.

Day 5: Rest and Relax Day

• Take this day for complete relaxation.
• Morning: Enjoy a leisurely breakfast at your hotel or cabin, with views of the mountains.
• Midday: Spa treatments or soak in a hot tub overlooking nature. Opt for a guided meditation or yoga session.
• Afternoon: Free time for reflection, journaling, or just taking in the surrounding beauty.
• Evening: Dinner at a peaceful restaurant with a wine list featuring local wines.

Day 6: Wine Tasting & Vineyard Tour

• Morning: Private transfer to a local vineyard in the Asheville area, such as Biltmore Winery (part of the famous Biltmore Estate).
• Afternoon: Participate in a vineyard tour and wine tasting experience, learning about the region's wines.
• Enjoy a light lunch paired with local wines at the vineyard.
• Evening: Head back to Asheville for a relaxed evening with a great dinner.

Day 7: Outdoor Adventure Day

• Morning: Another exciting hiking excursion, this time in Pisgah National Forest, known for its beautiful waterfalls and diverse wildlife.
• Afternoon: After the hike, head to a nearby river for some whitewater rafting or enjoy a more relaxing activity like fly fishing.
• Evening: Return for a casual dinner, paired with more wine tasting at a local Asheville wine bar or winery.

Day 8: Departure

• Morning: Enjoy a final nature walk or a relaxing breakfast at a café with views of the mountains.
• Private transfer back to Asheville Regional Airport for your departure.

Suggested Accommodation:

• Mid-range options: A cabin in the mountains or a boutique hotel in Asheville such as The Omni Grove Park Inn or Mountain Inn & Suites. These options provide a balance of comfort, nature, and convenience without being overly expensive.

Activities & Experiences:

• Hiking: Trails in the Blue Ridge Mountains, Pisgah National Forest, and Great Smoky Mountains.
• Kayaking: Kayak on Lake Lure or the Nantahala River.
• Wine Tasting: Visit local wineries and vineyards like Biltmore Estate Winery and others in the Asheville area.

This itinerary blends nature, adventure, and relaxation, creating the perfect balance for a rejuvenating retreat. Let me know if you’d like more details or to adjust any parts of the trip!