Angela Jones, head of partnerships at the park authority, welcomed the opportunity to open the conversation, but said wider consideration would be needed.
She said it would be considered as part of the organisation’s local development review next year, but added it was a national matter which fell under Welsh government planning legislation.
Ms Jones said the current local development plan allowed people to use or open car parks for up to 28 days each year.
She urged visitors to prepare their travel plans in advance and said existing measures to alleviate traffic had been successful, with a 70% increase in users of the Yr Wyddfa bus service over the past three years.
The Welsh government said: “Temporary use of land for car parking is possible in most locations up to 28 days in any year.
“If the National Park Authority want to consider a five year temporary use this should be done through the planning application process.”