Do not demand that a particular band play at the wedding reception, then use the money given to you to pay for said band (from her parents) to buy your wedding present for the couple & then ask for more money to pay the band at the wedding reception.
Appreciate, understand & know that your son now had a family of his own to prioritise, support & look after.
It's still ok to ask your son for help, just don't use emotional blackmail & manipulation to get it. And if he says no, accept it & of course be prepared to return the favour.
Your dil is either part of your family / like one of your own or she isn't. You can't pick & choose when it suits or if she says or does something you don't like.
If they have children do not try to name the baby for them (if they ask for suggestions or ideas give them but don't put them on the spot & ask they use a specific name because you like it), don't take over, barge your dil out the way to get to her crying baby first, try to feed the baby things they don't want the lo to have or try to teach or refer to her as anything other than the name by which she wants to be called.
Know when to stop or step back.
Don't expect them to do all the keeping the touch, visiting etc.
To be honest you already sound like a lovely, thoughtful, considerate mil & the fact you are asking the question shows you already care a great deal about this relationship - that's got to be half the battle won already! They're lucky to have you!