Hinds-
Don't worry about putting another probe hole in and regret the analog. The analog is a good backup, Something you may consider that has been discussed here is not drilling a hole and installing a grommet for remote probes but rather just a small notch at the top that way you can get your meat in and out of the mini with the probes still in.
As for how long of a burn with the basket: It depends on what kind of charcoal or lump and what temp I am running, wind, ambient temp, keeping the lid on, etc., With KBB I found the amount of ash build-up was choking off and killing the coals when there was plenty remaining. Not because the coals burnt out. I've gone to good lump and/or Royal Oak and get better times. You can pile more coals on if you leave out the bottom grill or even the diffuser for certain cooks. Measure how much room you have between the top of your basket to the bottom of the diffuser. And no-one ever said you cant but coals or wood chunks OUTSIDE around the basket perimeter.
Do you have a large tuna can with holes in it upside down over the bottom vent? That keeps them from getting choked off too.
Get some foil to line your diffuser for easier cleanup. I put a disposable pie tin on top of the diffuser to catch drips if Im not using the bottom grate.
You are going to love it! What's your plan for the first cook?