Yes, you can smoke meat the day before and serve from a crock pot. You can make BBQ beef for sandwiches. You can smoke a beef brisket, slice it and serve it hot from a crock pot. You can smoke a boston butt roast (pork) and make pulled pork and serve it from a crock pot.
I smoked a boston butt (where they cut country style ribs from) and finished it in a crock pot, froze what I didn't use and served it days later. It was wonderful the day I smoked it and it was just as wonderful two weeks later after I thawed it. My favorite wood for smoking came from a wet Jim Beam whiskey barrel sold in a garden supply business. My second favorite wood for smoking is mesquite and my third is hickory. I never use chips. I use chunks or whole fireplace logs.
If you cook the meat in a crock pot, you and your guests, who know smoked meat, will know it didn't come from a smoker/grill. But it will be tasty and delicious.
Go to allrecipes.com for lots of recipes and instructions.
BTW, if you want to skip the bother all together, buy from "Famous Dave's". This restaurant is a franchise started by Dave Anderson. He has won many BBQ cooking contests and started his restaurant chain based on his BBQ competition experience and recipes. His restaurants (10 in the Chicago area) are the only ones I've tried that are as good or better than the way I BBQ/smoke meat. (That is both a little brag on my part and praise for his various meats.) You can find instructions and recipes on his website, famousdaves.com. and on youtube: http://www.youtube.com/watch?v=79-3lRD4IQ8
Good luck to you and yours.