Lisa plans to install some free-standing shelves that are currently in the garage in the locker. (You of course can't attach things to the walls in a storage locker.) This will allow her to upgrade the shelves in the garage to some heavier-duty shelving that she can attach to the walls, it being our own garage and all that (one of the nice things about owning instead of renting). We'll then be able to move as much of the boxes we want to store (mostly Cheryl's books, actually; it's cheaper for her to pay me to store her stuff than to ship it and find a place in the UK) into the locker, and that will free up enough room to get the last of the boxes from Yuba City and close out that locker.
Of course, now that we've taken the plunge on a locker in Fernley, it's increasingly urgent to close out Yuba City so that we won't pay double rent. Unfortunately, a very busy travel season looms ahead in July-August, but we'll mange somehow.