I've had dallies for 12 years and have a 6 month old puppy. I find that a routine of sleep - pee in the garden - play - eat - sleep again does them well for a few months and even now she is in a crate all night and if I go out also during quiet parts of the day. My older ones are loose all the time but sleep a lot of it.
Puppies need a lot of sleep but they get so wound up playing they have to come down to earth which they find hard so a crate is good and they get used to it quickly. You need to ignore the squarking and after a short time they are asleep. My routine when I got her was 2 hours sleep (5-6 hours overnight) then it was pee time, play time then back in the crate with some food. 2 hours later repeat. Gradually she stayed out longer, played longer etc. If I'm out for a few hours she is still in her crate which is a big one but as she is now going to shows she has no problem sitting in a smaller one at the show.
I work from home and set aside a time of day to work (us. 2 sessions) when all the dogs know it's quiet time they seem to pick up on the older ones.
Good luck!