You can rest in the Royal Jelly vaults. (You probably have been.) You may get interrupted by a text statement, but no combats.
If you're seriously stuck, you might try fighting from a more defensible position.
Cast invisibility on your entire party. (I hope you have the invisibility spell.) You should have 1 or 2 invisibility rings at this point. For this strategy in the Aunt Bee combat, the 5th character on your roster should definitely have one, and the 4th should have one if available. If you kept the Helm of Teleportation (from the vending machine on the previous level) it can come in very handy in the fall back movement.
The 'big' combat prior to Aunt bee's chamber only happens once. After that you'll only face 12 giant bees. Don't let your front rank attack during this combat, just let the second rank kill these 12. If you don't have any invisibility rings, try to kill the bees using only your 4th and 6th characters. I know this may be difficult.
When the Aunt Bee battle starts, retreat into the corridor to the southwest and form your combat line to limit the number of attackers. This may require delaying your invisible characters to screen the movement of the visible characters. Save your AOE spells until a targetable area gets pretty full. It can make for a long battle, but it should be winnable. After the B-Men and giant bees are killed, all that's left is to kill Aunt Bee. You can get 4 melee attackers on her if one has the Helm of Teleportation to get behind her. A fighter with high dex and strength could make good use of the fine long bow and +2 arrows found earlier. (I hope you still have the arrows.)
Or you can try a completely different strategy. Good luck!