then just wait for it to arrive at the aircraft and then bring it to the cabin. As a captain you decide where the cargo goes. !!
I've considered that one myself but checked baggage is not allowed in the cabin and that’s that. I suspect if you were spotted by security doing what you describe you would, at best, be frogmarched out of the restricted zone and have your ID taken away.
Companies, and mine is one, that do not have systems in place to check in crew baggage need to get one sorted quickly so that this farce of having to go away without de-odorant, toothpaste etc. is ended ASAP. Quite what I will do when I next need to stay away I have not decided yet but I don't think it's going to involve leaving home base without the means to perform such basic tasks as brushing my teeth and washing my hair.