I just reload if anyone dies and the clerics are too low level to raise dead.

If you REAAAALLLLY can't get past this section and it's frustrating you to the point of quitting then

http://www.gamefaqs.com/pc/256221-icewind-dale/cheats

Cheat yourself some Rod of Ressurection or something along those lines and have the self control to not abuse it too much.

Also, having a small party is generally easier than a big party. All you ever need in the infinity engine games is a Half-elf Cleric/Ranger.