For the adult trips I would recommend the new place just across the street from the Ramada. It's called Island Suites. All units have only 1 king bed and no sleeper sofa, so it's just you and ??. They had a sign out last weekend with a $249 deal for 1 week or $900 for a month. Saw the rooms and they looked nice. 928-855-7333.
Otherwise I recommed renting a house when you take the whole fam damily, runs $165 - $225 a day. Good web site is www.havasuvacationrentals.com