Ok... good news bad news
The beginner surf at Kahalulu is open and you can rent a board there. This is the best visitors surf spot and no conflicts
Other sites such as Banyan, Lyman, Pine Tree are the prime spots. BUT, these are locals only spots.....I mean this is where the locals are more than protective of their spot... outsiders can have problems and for the most part not fit in...... It is not uncommon for confrontations to happen between local surfers and those visiting the area.
There is a surf code here where you have to earn the right to surf a certain beach. and in what order you can catch a wave. Respect it please. If you go with a class the situation changes some what as you are with a local guy....... this wont work on your own.... no way.
There is little to no surf or beaches north of the Airport and your Hotel... and the hotels there lack both aspect and breaks..... nothing like Maui or Oahu
Dont consider surfing anywhere north of the Hilton , the entire north, eastern and southern coast all the way to Keauhou. not good
For your anniversary... there are lots of options at the fairmont a very upscale place with dining to match...... ot at Mauni Lani..... canoe house or Tommy Bahamas