My DTs are turning 3 soon .
They attend pre school during term time and we want to invite their friends to a soft play party .
I was planning to send out the invites after the Easter holidays , but DH has pointed out that it will only give people a few days to RSVP.
I have to pay the balance of the venue two weeks before the party - I don't want to pay if I have no RSVPS (hence the only a few days to RSVP) .
If I send the invites out before the Easter holidays , then it will be 5 weeks from invite date to party date - is that too big of a gap?
If I send them out before the holidays , then it means I can see if the party is going to be viable before I pay the full balance on it . 
Opinions please ?