In wet regions, wrapped baleage has saved the day. We often can't get the last day for drying hay. Many fields would have been baled manure without plan B, a custom wrapper. I think summer students do the weather prediction in my area while veterans go to the cottage. It costs me about $10/bale to custom wrap with lots of plastic. For beef cows, don't worry about the high moisture trial stats. Almost dry, very dense baled grass/legume will work. You can't make a silk purse out of a sow's ear, so don't expect to save almost dry, overly mature grass hay with very limited legume from the rain by wrapping. Baleage is very palatable, they eat everything except coarse goldenrod stem. Most weeds have protein with poor palatability.
If you live with unpredictable summer weather, wet fall/ winter outside storage, its a good option. Tarps are a waste of money. Make sure the rows are well sealed for zero waste. The secret is proper ends on the row and located in traffic areas to deter birds & wildlife (claws). During cold weather, feed each bale within about 7 days after removal. Much faster in spring like conditions . Avoid saving any to the next season, although an end can be resealed with tape by removing the last bale without disturbing most of its plastic.
Those with large herds won't consider baleage as a good option, but there are many small operators on here too.