scanning underexposed negatives

I have my negatives from my wedding (back in 1999). All the indoor negatives are very dark. Either the photographers flash failed or had a very weak output. He apologized, refunded the money & gave me the negatives (35mm). I took some of the negatives to a lab & they were able to rescue them. Still a tad dark but very acceptable. Because of the disappointment I never really did much with the photos. Now I would like to surprise my wife & make a book for her. Here's my questions:

Can I pull this off with drum scans?

Do I have as much control with a drum scan as the lab did with dodging?

Any cheap places on the internet that will do the scans?

Could I do this with a flat bed?

Any suggestions on cheaply accomplishing this & still have a good result?

Thanks in advance!

-dMR