Go see it, it's worth the drive. And Belchertown is nearby!
And gas is cheap in Mass. (seriously I know most of you are from there or RI but in CT our gas is still over $4.)
Worst damage is in Monson, go there first. Springfield is indeed a mess but Monson is insane. Don't trust your GPS to get you through Wilbraham either, I somehow managed to get down Tinkham Rd. from Main St. only because I drive a small Subaru, an SUV wouldn't have the clearance to get under some of the wires. And I have no idea why that road wasn't closed or why no one stopped me from going down it, but then the more direct road to Monson was closed anyway.
You can take Rt. 32 directly to Monson, no problems ON 32 besides traffic from all the sightseers.
In Springfield, it looks like the tornado passed through a neighborhood of Victorian houses. There's some cop on Main St. that's on some crazy power trip and likes to yell at people (avoid Main St. even the sidewalks haha) but otherwise most of the cops will let you take pictures and don't cross red tape (yellow tape a-ok lol)
Springfield:
Monson: