Feasibility of complex custom partitioning recipe for preseeded install

[Johannes Graumann <johannes_graumann@web.de>]

Hello,

My personal systems follow the following partitioning scheme:
1) /boot (ext2)
2) /tmp (random key-encrypted ext2)
3) SWAP (random key-encrypted)
4) everything else (password encrypted, BTRFS)

I'm contemplating to start maintaining/document installation suing 
preseeding and was wondering whether a complex partitioning scheme like this 
is even handleable with a custom partitioning recipe. Google only spat out 
way less complex setups including encryption.

Pointers to examples to feed of? Places to ask instead?

Thank you for any hint.

Sincerely, Joh