5th person(child) in standard room

[mbcp]

We will be staying 2 nights at RPR end of June. We are a family of 5, 2 adults and 3 teens. Are we able to bring a aero (blow-up) type bed for the 3rd child and then not have to pay the $25.00 fee for the roll away but still get 5 room keys to allow us access to FOTL? Just trying to save a little money if we can. Have been reading these boards for awhile but haven't seen this specific question addressed. Thanks so much!