Mammoth Rider Companion Advice- Options

[Ninjaxenomorph]

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.

[Declindgrunt]

there is an armor enchant that can carry your animal companion when needed

its called hosteling it costs 7500g its not a static + enchant

[Ninjaxenomorph]

I mentioned that, but seem to have forgotten the actual name. Hosteling can only carry a companion the same size as you, or one size larger if heavy armor or a tower shield. This companion is huge, so I would need to buy either large-sized armor or a large-sized tower shield... or buy a Huge buckler and have that enchanted.

[Markov Spiked Chain]

I wish the compression ability were more clearly written. A belt of the Weasel probably lets your huge companion get around most places fine. Probably.

[666bender]

on cavalier or samurai, i like 4 levels of hunter.
1) reduce animal spell will make the pet only large for 2/hr/lvl. add narrow frame and it can go most places.
it also adds:
2) shared team feats
3) +2 str to both
and more.

[Gun Dragon]

Which companion is better the Mammoth or the Ankylosaur?