A trick I learned from posters on the Dis if you need someone to take your picture at a character meal - ask the character if they know of someone who can take your picture. I did a solo breakfast at Hollywood & Vine this year and asked this of Doc McStuffins - she found a nearby CM to come take our picture. The lovely lady CM was working the entrance near where I was seated and came over on her own a couple of times later when she saw the characters heading for my table.
Maybe because I was solo, but at all the meets I did, the CM handlers often volunteered to take pics with my camera or phone while the Photopass photog did his/her shots. (The handler would always happily take photos if asked, just sometimes they offered before I asked.) The more photographers, the better, and sometimes your best pics will be candids.