Where to conceal stuff in case of welfare check whilst I'm 'missing'?

[Pain In The Ass]

I plan to stay on a campsite in a caravan for a brief period of opiate/cocayn hedonism before I CTB at the same location, but I will likely be reported missing at first, so I may have to deal with a welfare check at some point. What are good methods to conceal drugs (both for hedonism and CTB) from police, in case I am stopped? I am sure they're aware of the usual fake drinks cans and bottles you can get. Unscrew some electrical appliance and hide stuff inside?

https://www.dolphinholidays.co.uk/w...w-caravan-holidays-tencreek-looe-polperro.jpg