Now it's a 2.5 hour drive to buy "local"
Is the nearest, a 5 hours RT? Indeed, not for one sack, marginally worth it for 4 sacks.
Now if you can combine the trip with another purpose, or perhaps picking up (grain) orders for other homebrewers in a club or a larger, organized grain buy, it may be worth it.
We used to have a decent size grain buy, ordering 42+ sacks at a time, going for years. It was about an hour drive each way for me, and definitely worth it. I would pick up for a couple other homebrew friends too.
When that buy totally fizzled out, I have been getting my grain from one of my 2 local LHBS', 30-40' away.
She stocks a wide variety of common base malts as well as many specialty malts. I can put in an order in advance for sacks of specific malts I want, such as Weyermann's Barke malt, or Simpson's Golden Promise, etc.
[Added] My specific order will be delivered to her store with her other orders, and ready for me to pick up any time the store is open. Her per sack pricing is only a little higher than our last group buy pricing used to be 4 years ago, and I don't have to wait 6-12 months for a group buy to materialize, and feel the need to stockpile extra sacks of malt for the next 2 years, just in case.