Ikea makes a brilliant pegboard with all kinds of accessories at a fair price. It is called the Skadis and I have used one for years to organize the side door exit/entry of our home for keys, sunscreen bottles, headlamps, letters that need to go to the mailbox, etc..
They are totally customizable with many different types of holders, including shelves. I needed something for the
Trillium kitchen to hold utensils, c fold paper towels (no room for paper towels in this wee camper), night flashlight, salt and pepper and hand/dishsoap, etc. and purchased the 22 x 14 wide and it does all that and fits perfectly next to the sink between it and the bed/dinette. I hung it by the hanger in the back using two plastic hooks (those super strong command strips up to three pounds each).
They make wider ones and I could of gone wider and wish I had now so I could have hung pot holders, cutting board etc. as well. Should have measured before making the purchase. Anyway the add ons available make this a great option for adding lightweight storage to our small trailers.
Will attempted pictures when I have time, otherwise you can check it out at Ikea online and look at the unit and all the accessories available. Skadis.