well where do I start - Purdey is now 8 1/2 months and over the months I've done a varied selection of training (that includes basic manners and routines in the house) Purdey doesn't have anything without earning it! ie :food, treats, hugs, toys and generally any interaction. When I say earning it I mean she's got to do something for me before having it ie: sit, down, stay, leave, paw etc you get the picture. It soon becomes part of everyday life but she 's still having to think and work for everything.
When it comes to play she has activity balls, kongs, and even carboard boxes with screwed up newspaper with treats inside - you can see her little mind trying to figure out how to get inside and get the goodies!!!!!
We are on the advanced puppy training classes once a week and we practice that 3/4 times a day depending on the commitments of that day.
As for walking Purdey has 30/40 mins in the morning of lead training walking and then in the afternoon she gets to be free off lead for 30/40 mins.
This wouldn't suit everyone's V but works for ours.Our trainer always insists that you can wear a puppy out more with mental stimulation than physical as like you stated they get very hyper after which is what we were experiencing at the beginning!
She is now very content and not tearing the house down for more and more in fact she's quite the opposite!!!!!!
good luck
BB