Well i am a Hervey Bay lover and ofter holiday there. great boat ramp and pontoon with fuel and bait next door. Accommodation everywhere from park cabins to houses and units. There is also lock up boat storage near the ramp if required. Fishing grounds can vary from 20 minutes run up to 1/2 to 20 hours from the ramp depending on where you want to go. Windy weather opions also available and no bars to cross. Take-away foods pubs bunning and bcf stores all local if required.
Even though i did read all of your needs what about orchid beach/waddy point on fraser. Good accommodation NO BOAT RAMP limited suppies big drive and expensive fuel. Fishing can be great though.
1770 again good accommodation pretty good ramp and pontoon generally bar is very good fishing can be very good. Shops pub bait and tackle all local.
Mooloolabah plenty of local accommodation good ramps and pontoons, bait tackle shops plus everything else you can think of. Bar is generally ok and fishing is a plenty from 15 minutes to 2 hours run.
Mark