When loading for revolvers and bolt action rifles, my brass never touched the ground at the range. And, I never felt an NEED to tumble it to make clean it enough or shiny.
Me too. I just do a quick wipe with a paper towel before resizing. After several cycles of this, I'll dump into the tumbler.
Note that if shooting BP, you'll need to wash every time. BTW, I normally just use hot tap water and some soap to clean 'em up. Not boiling water.
Don't worry about the 'inside' of the case. Just dry them and use 'em.
Note, if you have a decapping die to just knock out the primers, you should do that before you clean them. Otherwise, as soon as out side of case is dry, resize them and get the 'wet' spent primers out. They tend to hold water