Hi all, it's been a long while since I've been here! We just got our trailer back after off-season repairs, and I'm working on outfitting it a bit better. We got the trailer last summer, taking only 2 trips.
Anyway... if you have a Dollar Tree in your area, they sell a set of 2 small glass salt/pepper shakers ($1 for the set

). You can fit 4 comfortably on the bottom shelf of the spice rack, with room to get one out without taking the rest of them out first. So for $4 you can outfit the whole thing (8 shakers). Just fill with your favorite spices, and maybe label them in some way.
Have a great camping season!