I saw Fudge early last year and they were mind blowing.
The guitarist used very cliché in the book but was stellar. Bogert put Squire to shame in the bass solo( he caused havoc at the nearest Eathquake monitoring station ). appice was simply himself and the KB man was all over his real Hammond and looked uncannily like Mark Stein. One of the top 3 concert of the year (out of roughly 50)
As foor the Doors , most people I know that went to the concert were really impressed. I decided not to go along to it , because of them not waiting for Densmore to get better and finding a replacement (causing justly Densmore trying to stop them). Astbury was very Morrison-esque and the bassist had played in the Jeff Beck Group of 71-72.
If they had come as a double bill, I would have not hesitated a second. Sounds like a real must. go for it!