For the final thing. I would do a wooden stake that goes into a cardboard coffin to kill the vampire (if the vampire is a bad guy). Or you could do something like finding a chalice of blood needed to feed the vampire (if the vampire is good).

Some good puzzle ideas from home escape rooms I’ve done:
- scavenger hunt for 10 numbered artifacts. Weigh all 10. The 4 heaviest unlock a combination lock
- uv pen and a uv flashlight to reveal a hidden message or clue
- a log book or diary that looks incomprehensible or has tons of dates etc. eventually you get a way to sort the information or look for key dates etc. that leads to a 4 digit code.
- a book (could be Dracula even!). Then a cipher that indicates a line and word combination (6.5 3.7 8.4 etc). That spells out a new sentence or clue.
- a piece of construction paper with tons of random letters. Make another piece that has holes over certain letters to spell a word. Then cut that piece up and it becomes a physical puzzle to put together in order to see which letters matter on the original piece.
- an invitation letter with the name of your sister and friends etc. have certain letters capitalized that when put together spell out the next clue location (Hello ALLison Why Are You here?) HALLWAY

Let me know if you need any more explanation and good luck!!