Help me convince "FHU only" friends to try electric only CG

Our first couple seasons we did FHU only. Last year, we did one state park that had elec/water only. Found that to be no problem at all. This year, we are "graduating" to state parks with electric only. The first couple reserv's are for 2 nights and 3 nights respectively.

We want to learn and experience everything that our rig is capable of and how it all works. It's all part of the experience and learning curve. Besides, we are finding out that our state parks are beautiful and a lot less expensive than private parks.