Sorry to read about the loss of your honey bee colony. Small Hive Beetle (SHB) are a major pest all along the east coast of Australia and this year they are in plague proportions in may apiaries. Managing these is a must for any beekeeper and ensuring that you have a management strategy in place within any hive is a must for successful beekeeping.
Out of interest what type of SHB beetle trap system were you running in your hive?
There are a number of very successful commercially manufactured traps available and most of these work very effectively. Apithor ® , Beetle Jail ®, Beetle Blaster ®, SHB Silver Bullet ® are all good and readily available and I much prefer the Apithor for hives with a solid base hive and the Beetle Blaster for hives with a mesh or vented base and run vegetable oil in the Beetle Blaster which I find is very effective at keeping SHB under control.
As for the clean up, I would recommend placing the contents of your hive in a double wrap of garbage bags and then tying this off in a not and leaving it in the sun to solarise (cook) as this will then kill off the SHB larvae and also any wax moth grubs. That said give it 2 full days in the sun all wrapped up to heat the contents of the bags to the heat required to kill of the insect infestation.
I would then either send the bag with its contents off to landfill or pull the frames out of the bags and clean these up with a high pressure water hose before repairing these, as need be, and placing fresh wax foundation so that they are ready for Spring 2018.
The goop in the bag I would then send off to landfill or burn, its your choice but just remember that SHB pupate in the soil so dont bury these as where any are alive you are then just adding to the problem.
I see in your post that you suggested that the closest hive is at least 1 km away, this sounds like the closest managed hive and this is a good reminder to us all that unmanaged (feral) hives hiving in tree hollows or the like are also plagued by infestations of SHB which has smashed a lot of the feral hives living around the place that were once common in possum boxes, compost bins, tree hollows and the like in and around rural ACT & NSW.
I would keep your boxes, lids, base etc as based on what you have written these will be unaffected BUT you MUST clean these up before putting bees back in them.
I can add you to the Spring 2018 nucleus hive list that I am compiling to get you off to another start in Spring 2018 and these will be available from the 3rd week of October weather permitting.
SHB are a real pest and must be managed, otherwise they will trash a hive very quickly and what you have reported occurring in a matter of weeks is not surprising and exactly what others are reporting in Forrest ACT, Evatt (ACT), Bywong & parts of Queanbeyan (NSW). Commercial beekeepers are along plagued with the problem and try various methods of management to ensure that SHB don’t get a strangle hold of their apiaries.
Lastly, just to clarify a point in your post, Sam RBK) is the owner of the site www.Canberrabees.com and is kind enough to host and run this site for the free sharing of beekeeping related information for those in and around Canberra but he is not me (Eric) and whilst we are mates he doesn’t have anything to do with Better Bee Hives so I thought that that was clarifying so you know what his posts are (RBK) and what mine are (BBH).