I've used a few of the cameras mentioned above. Years ago, I had a Pentax MX, which is a great solid little camera. Inside though it has plastic "magic needles" on the take up spool where you feed in the film leader - not sure how these will have aged.

Then for the last 20 years I've used Nikons - FE, FE2, FM2n, F100, D70s, D200. For your purposes, I guess FE, FE2, FM2n are most appropriate - I can thoroughly recommend all of them (also FM, FM3A). All the FM, FE range are simple, reliable, very well built and will last "forever". The FM range is manual only, the FE range have aperture priority as well (the FM3A should really be called the FE3M but let's not get side-tracked). If you're unlucky to need to get your camera repaired, then any decent repair shop will be well used to Nikons.

The camera you use doesn't really matter. Get a decent reliable one that will do the job and go and take take photos.

Hope this helps.