Ofcourse you should do smaller amounts as others have said before however I believe a good way to do it is hit a bitcoin atm a few times with what you have as whilst they may be recorded or w/e they don't have to know who you are.
Some of them record your fingerprints via touchscreen so they will certainly red flag you if you are doing unusually high volumes
Split it up into smaller chunks is the best way and if possible buy them directly from a mining pools of the owners agree and avoid the exchanges imo