What to do with all those 3e adventures?

[Glyfair]

I ran the WotC 3.0 series of adventures on the fly using 3.5 and the main problem I had was some of the creatures changed size. Really mucked up a couple of the encounters in Heart of Nightfang Spire. But otherwise you shouldn't have any real problems.

The problem was you used the 3.5 version of the creatures. I recommend sticking with the 3.0 stats with minor modifications and you'll do fine.

 

[Philotomy Jurament]

I never moved to 3.5 -- I just cherry-picked 3.5 rules/spells and house-ruled my 3.0 game. The differences between 3.0 and 3.5 aren't worth worrying about, IMO. You can run a 3.0 adventure with 3.5 rules, or a 3.5 adventure with 3.0 rules, and unless you have some seriously anal rules lawyers, it just won't matter.

 

[JustinA]

Since you all are much more experienced, I would like your opinion on which is going to be more rewarding for us in the long run, shifting to 3.5 now and having to convert everything on my shelf to the new rules?

In terms of modules? Don't bother converting. With the exception of damage reduction and skills, there's nothing about 3.0 stat blocks which prevent you from using them with the 3.5 rules.

In terms of skills, don't both converting. Sure, there's no longer a Read Lips skill in 3.5. But you've played 3.0. You know what the Read Lips skill does if it happens to pop up in a stat block. Roll the check and move on.

In terms of damage reduction, there are three options:

(1) If it's a creature from the MM, reference the 3.5 MM to figure out what the damage reduction was changed to.

(2) For that particular stat block, use the 3.0 damage reduction rules.

(3) Simply change the damage reduction to /magic.

I wouldn't recommend the last option, and if you're going to use the second you should let the players know so they aren't blind-sided by it. (I mean let them know that you will occasionally be using the 3.0 damage reduction rules as a ground rule for the campaign or adventure.)

The only other thing to watch out for is that some tactics described in a module might now work due to the changes in the way certain spells work (such as the buff durations and the changes to haste).

But what about the fact that the ranger was changed? It just doesn't matter. The 3.5 updates are undoubtedly better, but that doesn't mean the old 3.0 classes were completely teh br0k3n.

Such and such a monster was changes in some significant way? Doesn't matter. This particular monster is the 3.0 verison (which was weaker or stronger, smaller or larger, tougher or more vulnerable... whatever).

If you were a professional designer, doing a full conversion would be important. But for just running a game? Don't sweat the details.

 

[Flynn]

There's an actual conversion guide from 3E to v3.5 that covers a lot of the differences, in case you are interested in reviewing that. With that, your adventures should be very easy to convert and run. A copy can be found here:
http://stuff.mit.edu/people/chads/dnd/srd35/DnD35_update_booklet.pdf

Hope This Helps,
Flynn