This is a small rental/pick-up/drop-off site for Avis. It is in Best Western's Granite State Inn. There are no distinguishing signs that say Avis on them so just head to the front desk of the hotel for assistance.
Budget Truck Rental rents moving trucks and other moving equipment. It also sells moving supplies, like boxes and packing materials, plus it offers tips on handling a move. It is located on the left just before the bridge that crosses over into North Hampton. The website provides comprehensive information.