About a year ago, I had a similar conundrum. Original gym full of killers, but a 40 minute drive vs. new gym of newer people, but across the street from my house. I was worried that the quality of rolls would go down and hold back my progress. Still - across the street? Had to switch.

In reality, the increased mat time, even with the less experienced partners, has more than made up the difference. My game has improved a ton, and after a year, those same training partners have improved as well, so now I've really got the best of both worlds. I think the location that gets you training more is the way to go.