I basically stuff the vivariums full of plants.
Cryptic basking is basically a lot of stuff at or around the basking site that the snake can use.. particularly overhead, so it feels covered, but it still allows heat/UV light to penetrate. Imagine sun shining on a tree and on the floor below you'd find patches of shadow and sunlight. Many snakes and reptiles utilize this basking behavior to avoid predation.
F.e. this is from my MBK who either lays right under that plant all out, or throws out a hoop to utilize the UV and heat light. There are more spots like that throughout the vivarium. The only time he's 100% hiding is when he goes in shed.. if he's not then he's basking in the day continuously.
Edit: forgot to mention... if you wish to keep plants under a heat lamp that would at short range easily cross 60C surface temps on the leaves of it, all you need to add is ventilation. I use CPU fans on a controller to provide a soft breeze and plenty of water and the plants will do just fine.
Another edit: of course enough cover should be provided throughout the vivarium. Not just the basking site.