I heartily recommend Astro Glide for the girly bits, along with Chamois Butt'r for the rest. Actually, after having pretty extreme issues last season, the Astro Glide works the best. But, I never have had any issues with the Butt'r causing problems if it gets near the "a-hem" parts. You only need a little bit of Astro Glide and it comes in a small plastic bottle that can fit in a pocket or small bag.
You might want to look into the menopause issue, too. Thinning membranes were playing a role in my discomfort and can easily be cured with topical estrogen or an Estring.