Normal drive home afterward? 15 minutes, 8 miles, and about 1/2 gallon of gas in the guzzling van.
Taking the T? 45-60 minutes, 2 trains and a bus, and $2.15 (red line, to orange or green, to bus).
Unfortunately, the T drives up the major highways, with few crossings, so getting home from Davis requires going down one spoke (along I-93) into Boston, and up another spoke (along Route 1) to Chelsea.
Anybody else going to the Diesel who'll be passing anywhere near Chelsea afterward? The Route 1 / Route 16 intersection makes a grand drop-off -- about a mile from my door, and I'm happy enough to walk that. I'll also pitch in a buck or two for your gas tank.
I'll probably be at the Diesel even without ride-assistance, but you'd make my evening far nicer if you were up for the excursion/detour.....