Scott Disick & Kourtney Kardashian Together Again -- Happy Hamptons Family

The family that slides together, stays together -- at least, that's what Scott Disick is hoping for after a rough patch with Kourtney ... because yesterday, the guy put in some serious bonding time at a street fair.

The Lord, Kourt and son Mason appeared to be one big, happy family as they hit ride after ride at a carnival in the Hamptons ... including one of those huge slides and a teacup-thingy.

It's a big deal for Scott -- who got left in the cold by Kourtney last month when he was kicked out of their Hamptons home for partying too much. She then left him behind for North West's first birthday party, which Scott responded to by partying in the Hamptons.

There were questions about Scott and Kourt's relationship -- but Scott responded over the weekend by posting a pic of the couple holding hands on Instagram with the word "Love" sprawled across the image.

So ... all is well??