Hello Mary and Harold,
In reading your resume I could give you a few suggestions to improver your chances of getting the position you desire.
1- Are you "team players"? If you can work well with others, take constructive direction, and interface well with others-- tell them that in your resume.
2- Are you "self starters"? If you see something wrong do you jump in and fix it or get it fixed. Some folks don't.
3- Are you afraid of doing a little extra work to accomplish the goals of your employer?
If not, tell them you will do what it takes to complete the task/job properly. Display a positive attitude!
Having done this for a number of years (Workamp)and I have seen some sorry folks. One lady said to me "she knows what to tell employers" to get a job. Another man would not work with women-- he felt he was superior in intelect, but he made mistakes like the rest of us. One woman was in the job for a week of training and then said "I should be a manager" of this place-- and she was serious!. She made more mistakes in the office work than the rest of us combined during the season. Before you offer suggestions of how to improve "the system", make sure you thoroughly understand it.
Some RV parks are sensitive to "older model" RV's-- as you stated in your opening paragraph. They will probably ask for a picture of you and your rig. This can be overcome with a good picture of you and a clean, neat looking rig and some of the points I made in my dissertation above.
Have you gone to Workampers
and signed up for the daily job openings via Email. This is a must-- and "jump on it" immediately when you find a position you want,having a good picture and a short, to the point, resume ready to go.
Best of luck in your workamping life ahead-- It can be an exciting, rewarding and wonderful experience.