If I'm reading correctly, you have sold the house and are going to 'try' a 6-week trip to see if you can live in the RV and you're going to do a fun vacation thing. Personally, this will not give you any idea on full-timing. It will still be thought of as a vacation.
You said your wife is the reason you have a RV. She is already downsizing and urging you to get going on your stuff. You are having a hard time letting go of your 'stuff'.
What things are you having a difficult time of letting go? Are they things you use all the time or are they just 'there'.
I think your wife could easily go full-time but I seriously doubt that you are onboard for this.
You have to both want it equally or it won't work.
Storage fees are very expensive for a household of stuff if you're going to leave it there for years. Will you even want to use the stuff you stored? I'd hate to think what we would have spent on storage for our 16 years of full-timing.
However, in your case I really see a hesitancy. Therefore, put your stuff in storage and take your 6-week trip and then re-think it. If it's not for you then buy another house.
In our case, we were downsized early from our jobs. In winter we took our small trailer down to Florida for six months. We talked to a lot of full-timers in the parks. We had never heard of the idea. On our way home we said, "We haven't missed anything in the big 2500' sq ft house. We took everything we needed. We don't want to spend the winters in cold anymore. We're too young and healthy to stay idle. Let's go full-time". We sold the house and everything in it that summer and left for good in August and never regretted our decision.
We advertised the big things individually. We gave the kids what they wanted and it was very little as they had their own 'stuff'. We gave a few items to friends but they had their own 'stuff'. We then had a big house sale and what was left went to Goodwill or the dump. 'Stuff' owns you. It was a huge weight off our shoulders to get rid of it all. We invested the money from the house which was paid for.
We did everything on our bucket list and had awesome experiences. We met many new lifetime friends. It was a great lifestyle. We found a tiny place (1000 sq ft) in a completely different state that we would have never thought of living. We found we don't need much room anymore. It came completely furnished down to linens and silverware. We didn't have to buy a thing. It requires no yard work. It's in a 55+ community with activities of every kind. We are busy daily.
We did a turnaround and then had to sell everything from our motorhome and our motorhome itself. We still miss the full-time lifestyle but we're also happy where we are in our lives now.
Think it over carefully and best of luck with your decision.