You do not actually need a roasting rack to roast food. However, using a roasting rack optimizes the air circulation so food cooks evenly on all sides.
No swimming. The gorge is narrow and is set up for hiking with no access to the water at all. It would be very dangerous. Can you swim at the Basin NH? No
If you've never ordered a platter, look for the “Order Party Platters Here” kiosk near the bakery or meat department. Just fill out the form and drop it