Eric, that is a fantastic result from a first year colony!! Well done bees and beek 
At the end of the season I put the empty/sticky Flow super above an inner cover on the brood boxes and with the lid on. This works well for me, and after a day the whole super goes into the deep freeze for 24+ hours to kill off any pest eggs. Definitely do this - just yesterday I finally had time to rotate some boxes from the freezer to the shed (stacked with stiff plastic chicken feed bag sheets between) so my Flow super could go in after bee cleanup…it had been sitting outside in my garden cart with the roof on top, but the time and conditions allowed dozens of SHB larvae to hatch in a little bit of debris 
After the freeze treatment I’ll put all the frames into a plastic garbage bag, nestled into the box, and stacked in the shed. @Dawn_SD does similar re the freezer routine, but uses burlap successfully to protect from moths in storage.