Key Storage â Grissom is Leon Valley and the surrounding area's premier self storage facility. In addition to providing unparalleled security and month-to-month leases, we offer office and warehouse units for rent and can even accommodate your boat or RV. Did we mention theyâre also climate-controlled? No need to worry about those hot Texas summers, because weâve got you covered! Visit us at 6209 Grissom Road, give us a call, or follow the link below to reserve your unit today.