I also recommend the geotextile.
We can get VERY wet here at times.
Geotextile + 3 or 4" of coarse rock (I use #2 limestone--thats a coarse chunk and lets the water drain down and away. ) followed by 3 or 4" of 10FF lime. It is more coarse than AG lime and it packs like concrete.
It is, in my opinion, very important to use the coarse stone for the base. If the water table rises into the lime, the lime turns soupy and the cattle carry it away on their feet. Also, do some site prep so that you unroll the geotextile onto a smooth surface tilted the way you want it to drain.
I'm very happy with a 100' * 50' pad I built this way. I feed hay there and me and the cows no longer eat in the mud.
Maintenance is good. I need to scrape the pad off and freshen it up with $500 worth of lime, but thats my first repair.
I recall spending about 3400 on this, 3 yr ago, but trucking affects rock significantly so you will spend more today.
My geotextile was black and came in 15' wide rolls. I got it from 50 miles away at a place which sells culverts and drainage pipe and such. I have also used a brand which comes in 7' wide rolls, if that works better for you. You'll have to google--I'm sorry for the lack of links.
In SE IN we get drought and we get mud. We complain about them without discrimination. But you can do something about mud. You can't do anything about drought. Start tithing is about the only response to drought. :lol: