I probably have over 100 pallets sitting out in my backyard as well. But I only am able to pick up maybe 6 pallets at a time in my old Ford Explorer. If I have my small trailer hooked up, I can get about 10 pallets in that. Do you have a big trailer or something like that to get 25 pallets, or did you make multiple trips?
In my case, I rarely ever see more than 4-5 pallets for pickup at one time, so the old Ford Explorer is just fine without the trailer.
Picture of my pallet stash in the backyard - last summer - but last count was about 100 pallets....
FYI, I live in northern Minnesota and all my pallets outside are covered in snow. So, I not doing much this time of year either. However, in that picture, you can see I have a metal shed. I emptied that shed out this past summer and started refilling it with pallet wood that I have broken down and de-nailed. All the wood in there is ready - and dry - for any build projects this spring. I got maybe 1/3 of that shed filled with ready to use pallet wood lumber.
I don't mind storing pallets outside in the rain and snow, but when I build stuff with the pallet wood, I like the wood to be dry. Anyways, it was a big deal for me to empty out all the junk in that old metal storage shed and put the shed to good use for storing pallet wood.