Accommodation Camping Typically involves most nights sleeping in tents (sometimes permanent tented sites) or in rustic cabins and lodges.
Basic - 2 star You'll stay in no-frills, but clean and comfortable, hotels or guesthouses. A 'Basic' trip might also involve a few nights of camping.
Value - 3 star Mid-range budget with accommodations ranging from comfortable lodges, guesthouses, and homestays to three star hotels.
Premium - 4 star 3 to 4 star western hotel equivalents. While not all lodging will be 'luxury' they will be quite comfortable by western standards.
Luxury - 5 star The highest level of comfort and service. All accomodations are in four or five star hotels, boutique lodges or high-end homestays.

Physical Level Very Easy Minimal walking - motor vehicles available for all major parts of trip.
Easy Normal generally flat walking in urban or suburban environments.
Moderate Walking or physical activity half to most of day - no carrying equipment.
Strenuous All or most of day hiking or biking, hills included.
Extreme Very challenging all day hiking and backpacking carrying significant equipment.