Bonk is a famous grumpy tomato frog
In my games, I have a spot skill and if you spend 10 min in a square you get a stat roll
Skilled get a full stat to save, unskilled half - then various bonuses for items etc
Possibly some doors I might allow a harder save (stat bonus score only)
Some doors easier to find by touch or sound than sight
d12 Secret Door Styles
1 Camouflaged easily exposed by touch examination
2 Concealed small door or hatch is hidden by some feature or decor like a rug
3 Concealed door built into furniture or architecture
4 Sliding concealed panel
5 Swiveling concealed panel
6 Bricked up crawlspace or airway from construction
7 Bricked up wall or chamber concealed by craft
8 Built into the wall or floor following construction seems
9 Revolving wall section with swivel mechanism
10 Magical concealed by permanent illusion
11 Door concealed by permanent invisibility
12 Door is a portal usually to a room size pocket dimension
d12 Secret Door Mechanisms
1 Difficult to spot button
2 Simple trick mechanism
3 Combination mechanism
4 Secret lever separate to door to find and open
5 Door has secret keyholes and lock
6 Trapped switch with separate hidden safety button
7 Complex puzzle mechanism
8 Complex puzzle and trapped trigger
9 Several mechanisms d4+2, only one real rest trapped
10 Magical alarm or magic mouth spell
11 Magical lock or held portal
12 Magical trap wards or runes or sigils