MC's knows his mother's name, so it's highly unlikely she is a Burgmeister, MC would have noticed when applying to the school before he even met Rusty.... So if she's related to the Burgmeister's it's not likely it's by name.... (the dead grandma was a Burgmeister or a Burgmeister is married to a sister of MC's grandfather, things like that)
The big question is why would it be important for the story? There's already a link between Rusty and MC : the Dik's !
For the polaroid camera, well, that's not a likely link, these are fairly common and Lynette was not yet involved with Neil when that picture was taken. Then Jill made one after MC's 19th birthday, so there's roughly 20 years (19 year + 9 months pregnant + whatever time between the photo was taken and Lynette indeed hooked up with Neil and got pregnant)
Still could be it's for sentimental reasons if it really is Lana's camera, but would it even work after all this time?
As for Lana, she looks about 18/19 when she talks to a Jill that's anywhere between 10 and 14, hard to say exact.
That said Jill is 21 now, Lynette would be 38-40, and Lana would be 25 - 30 now (4-9 years older then Jill)
So being one of Lynette's friends is not likely. But it's possible Lynette or one of her girlfriends were Lana's babysitter.
This one can still go anywhere, we know there's a link between Lynette and Jill : Jill's parental home.