Hickory: Durlag's Tower, and Wolf Island, will require that you have more than basic weapons to complete. In fact, you won't even get INTO Durlag's Tower without magical items. There are a few encounters that you can do to 'legally' get enchanted weapons.
Edit: Forgot to add that you can come out of Durlag's Tower if you find it too taxing, but there are things to remember, most importantly are to keep hold of the ward stones if you intend to return!
********** POSSIBLE SPOILERS **********
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Dagger+2 -- Hentold, east of Carnival.
Dagger of Venom (+2) -- smithy in Beregost.
Flail+1 -- Bear cave west of Nashkel and Icharid in Ulchaster.
Mace+1 -- Smithy in Beregost.
Morning Star+1 -- Drakar near Gullykin.
Halberd+1 -- Cave SW of Nashkel
Quarter Staff+1 -- Silke in Beregost.
Quarter Staff+3 -- Sold in Ulgoth's Beard.
Bastard Sword+1 -- Feldpost Inn, Beregost.
Longsword+1 -- Smithy in Beregost.
Longsword+2 -- Greywolf near Nashkel Mines.
Short Sword+1 -- Smithy in Beregost.
Short Sword+2 -- Zargal, SW of Beregost.
Scimitar+3 and +5 -- Drizzt... if you have the nerve!
Warhammer+1 -- Raiken, Peldvale.
Warhammer+2 -- Bassilus, SW of Beregost.
Two Handed Sword+1 -- Arghain, NE of Nashkel.
Composite Longbow+1 -- Feldpost Inn, Beregost.
Shortbow+1 -- Smithy in Beregost.
Sling+1 -- Smithy in Beregost.
Magical ammunition -- Smithy in Beregost.
I may have missed some, but those are the ones I can recall.
There is also one Bastardsword +1 that you can steal from a chest from the Balck Smith in Beregost. You can also buy a magical crossbow (speed -1) from the same vendor. Honestly I always purchase this and the dagger of venom from him as the dagger is extremely useful against spell-casters.