NEW IDEA:

Think about different types of holidays:

Easter?

Easter is a very good idea - It is close to the dates so means that props and outfits will be available locally.
It also means that the issue name would fit in with the time period.
Chocolate, Easter egg hunts and bonnets also fit in with this and also are very 'fun'.
Locations would be outside - very rural - think of rabbits natural habitat
Also outfits can be very plain if bunny ears are worn?

Christmas? 

This also is fitting with the theme of holidays and 'fun and games'.
Props and outfits would be hard to find locally - not enough time to order
Locations - big trees? No snow to add winter effect

Valentines?

 

Has recently been so is current.
Items/ props would be easy to make/ find.
Pink and red outfits - not as fun and relevant as Easter though.
Locations? Wedding? Big castles - would mean travelling. 

School holiday?

 Is current - school uniform for outfit - however may clash with peer with 'childhood'
Locations - anywhere can be used
Not as fun as any of the above - but could be unique by having models pull silly faces?