You can create a pocket query with a bookmark list as well.
Create a new bookmark (“My Series”).
Then visit the detail page of each cache you want on the map and click “bookmark listing” in the upper right menu (near where the “log your visit” menu option is).
Select the bookmark you just created and clikc ok/add whatever.
Repeat this for each cache you want on your map.
When you’re done with that part, click “Your Profile” in the main site menu on the left.
Somehere along the right side of your profile page (Under “Premium Featuers”) is “Manage Bookmarks” Click that… yes you have to be a premium member to do this.
Find your bookmark listing for the series (“My Series”) in the list and click “Create Pocket Query”. Click “Submit Information”
Now you can preview the pocket query and it will show only the bookmarked caches on the map just like on the normal map search page.