Thank you in advance!! We are thinking of a 3 night trip to Gettysburg in mid September. (Smart time to visit?) Active seniors who would be grateful for advice on how to acquire discounts and value. Ideally, we are looking for a modern, newish place to stay that is very near "the action." If there are any "don't miss" activities or " off the beaten path" special things to do, please share. Any restaurant that you truly enjoyed? With appreciation!
Sandy

Things you absolutely should do:
1) Visit the Visitors Center FIRST! Watch the film, see the Cyclorama, and visit the Museum BEFORE you tour the Battlefield.
2) Reserve a Licensed Battlefield Guide - I highly recommend this and definitely do the three-hour tour (and more if you want - call them to extend or personalize your tour). This is money well-spent - they drive your car and tell you more than you ever expected, while you get to enjoy, watch, and learn.
3) You may want to join the Friends of Gettysburg - but for two it may not make sense from a money-saving standpoint (it did for my family of 5). It would give you access to the museum, film, and cyclorama for more than one day, where a ticket bought direct at the visitor center is good for one day only. This would apply if you wanted to go back after your battlefield tour.

I can't help you on lodging, as we stayed at the Country Inn and Suites (again, family of 5). Dining - we really enjoyed Food 101 - you'll find it's highly rated for a good reason! We also ate at Gerryowen Irish Pub, which was also good.
Also, Little Round Top is currently closed (and was last year when my family visited but I have been before when it was open). It is scheduled to reopen any time now (website says late spring or early summer 2024) - so hopefully it is open by the time of your visit.

Welcome, mrsgo. bmillersc's info above looks good. Many years ago we had a wonderful tour of the room where Lincoln stayed when he did his famous address. If memory serves, his speech with changes was there. Also, the building was to be closed for renovation... this was at least 16 years ago so I'm hoping the renovations are complete. Please share about your trip!

bmillersc is spot on, especially #2. Be early, those guides book up quickly.

If you decide to do some exploring outside the immediate area, Frederick, Maryland could be worth a visit. It's about 45 minutes to an hour away from Gettysburg. Has some interesting sights, including the National Museum of Civil War Medicine and is an attractive town in its own right.

Different tack -- read McPherson's Hallowed Ground, A Walk at Gettysburg
If possible, watch the Gettysburg episodes of Ken Burn's Civil War series.
Be sure to get to the Visitor's Center.

We drove it once, with a guide pamphlet. A year or so later went back with bicycles and rode. Think I preferred the bike for getting a feel for the terrain.

We stayed at the Gettysburg Hotel, and had a passable meal there. (Note, this was about 15 years ago.)

We also had one of the worst meals of our lives at an Italian restaurant near the square. My son ordered the chicken parmigiana, but wasn't making any progress. We urged him to eat his chicken, but a woman at a nearby table pleaded with us, "Don't make him eat it!"
I tried to cut it with my knife but it was impenetrable. We laughed about it for years.

Antietam battlefield is another interesting and important site about an hour away from Gettysburg. It is much less touristed/touristy than Gettysburg

My suggestion is not in direct response tour your specific questions but, if you are not already, I would try to become as knowledgeable about the history of the battle as possible before I got there. Knowing what happened and when as well as knowing about the people involved adds immeasurably to the experience, at least IMO.

I have to agree with all those above who recommend learning about the battle beforehand. I'm not a Civil War fan/buff (WWII is my preferred), but we live in the DC area and can not escape the history. "If you can't beat 'em..." The Ken Burns series was, for me, a good primer. I relied on DH for the rest of the history, but would not pooh-pooh hiring a knowledgeable guide.

As for restaurants, when we go to Gettysburg and surrounds we usually bring DDog. The Gettysburger is our go-to for your basic burger and fries meal, as it has outdoor seating for DDog.