In PFS my samurai just reached level 10, taking his first level of Mammoth Rider. I've been preparing for this for a while so I'm familiar with some options, but I haven't been as up to date as I could be. I'm looking for a way to make the mount relatively relevant in as many situations as possible; I know the spell Carry Companion could handle it easily, but I don't currently have the book, and was looking to see if there was other options available. I could buy and enchant a large-sized tower shield, which I guess is slightly more portable than a huge-sized giant cat, but not very. Another option is Pup Shape, but I think that's more trouble than it's worth.
Any other options besides buying a want of Carry Companion? If that's the only option I'm fine with it, but I'd like to know of any other options out there.