Your parents bring home the bed you picked out. Don't upset them. Spend naptime in there. Put animals in the bed. Roll in the covers. Let them know the money on a bed that looks like a car was well spent.
Regarding naps. Yeah, they are a pain. You miss stuff going on in the house. You have to stop your cool game with your Little People, babies and your cars. But here me out--you need that nap so you can be alert when it comes to bedtime. And be sure you take that nap in the new bed--it's not so bad and beside why sleep in mommy and daddy's bed when they aren't there?!
At bedtime, it is time to pull out all the stops. Do they like giggles? Give them a giggle feast! Kisses? Cover both of them with kisses and hugs--this is especially good if they are not next to each other--can you run back and forth (giggling) giving them kisses and hugs (aren't ya glad you took that nap now?). If they are the type of mommy and daddy that want a super smart kid, start pulling out books and pretend to read--say out loud something in the picture and they will be so busy gushing about their little Einstein, they won't notice it is bedtime.
This one is big--do not and repeat do not cry. Ever. Crying wears you out and only gets mommy and daddy upset. You want them to want to be with you--not force it on them.
If you see one of your parents yawn, kiss them and say night night. Then toddle (swish your butt for the cute factor) and climb in mommy and daddy's bed like you own it. Don't act like it is something special. Act like this is normal. Hopefully it is late enough they won't notice.
When they approach you in bed, pull the covers up to your chin and smile--really really smile and then say 'I wuv you' even if you can say 'I love you' clearer than your oldest sister, say it with the slur. This will make mommy and daddy melt and figure--hey it's only one night. Let the baby stay with us.
If mom and dad are still determined, go back to the giggling and kissing. If they try to lift you out of the bed, grab a pillow and say a very soft but firm 'NO' adding 'I wuv you' and don't forget to smile :)
Gotta go, mommy is coming back with a smile. Looks like I will soon be up to my neck in argyle!