If you are at a barn and have someone to help shlep the trunk around, I like Sawhorse and they have been around for quite some time.
I recently sold my tack trunk on Craigslist because I could no longer physically move it by myself. When I was 22 it was fine to push/pull and hoist it into my trailer. Now, I’m too old/lazy/afraid of risking a hernia to deal with it.
I ended up getting plastic drawers from Rubbermaid. I have them stacked neatly, and can keep stuff separated and organized. The problem with the trunk is it becomes a bottomless pit if you don’t stay on top of keeping it clean, and the things that end up at the very bottom…I became afraid of sticking my hand down there to root around for something.
Of course, the trunk looks lovely at shows, etc. etc., but I really like the drawers and how easy it is to pick them up and move with them. I have 4 drawers stacked, and it fits perfectly under the saddle rack. The drawers also fit in my little car perfectly, so I have the option of hired transport for my horse for longer distance events or I can just put them in my trailer dressing room when I am doing the hauling myself and still have plenty of room for feed/buckets/stable supplies.