As a rough guide:
Should I go right to the gallery owner?
Yes - make an appointment to ensure you don't turn up at a bad time or go to a gallery that isn't looking for work at all.
How much work should I bring?
Start by showing 10 or 12 - have proofs of more handy to show if appropriate.
Would they be expecting mounted and matted prints in frames?
For a portofolio viewing, certainly no frames. Prints in acetate sleeves is OK, mounted and matted looks better and protects the prints from bad handling (it's amazing who many people will grab a large print with one hand and crease it).
How about pricing and commission? How much is reasonable?
Pricing is very controversial - some otherwise sane people are willing to sell prints for $10! A serious gallery is unlikely to feel it worthwhile to sell framed prtints for less than $400 - 500, 50% commission is pretty much standard.
What kind of contract is involved if any?
A fairly simple one, a written contract as such is not absolutely necessary, I would say what you must get in writing is a schedule of the works you have given to the gallery. The gallery may want a contract if it attaches importance to geographical exclusivity (you don't sell at any other gallery within XX miles), limited editions, etc.
Regards,
David
Lots of stupid questions but I am starting from the absolute bottom with no connections. Its been 20 years since I got my MFA during which time I have had another carreer.