I used to run some 1e for my cousins and at their request was going to run a game New Years eve for them and my daughter (3.5 rules) using bullywug gambit. I was going to reduce the number of combat encounters to fit it in one night and made up some pregens. Do you think 3rd level will be adequate or will the get wiped out at the mansion?
Wiped out I suspect. Playing through it I think we were in the 4-5 range by the end of it.