How old is too old for an RV?

My Motor home is now over 13 years old, and I so far haven't been turned away. and that's probably because I don't go in for staying at Resort parks. Sooner or later these type Rv Parks are going to figure it out that not everyone can upgrade to a new rig every 10 years.

I have never heard of anyone being turned away. However, if you do go to a high dollar (fancy) resort, they may be more critical. The key is to keep the RV looking nice and maintained. Personally I would never go to a place that has that rule and my RV is not 10 years old (yet).

You mentioned 10 year old rv with low mile or brand new travel trailer. I assume you are looking at a used motorhome vs new trailer due to costs. The 10 yr rule is far and few between. Some of those places you wouldn't be able to get in with a travel trailer anyway.

Just because a motorhome has low mileage, does not mean that it's in good condition. You need to have a mechanic go over it with a fine tooth comb. Something to think about is that a motorhome has an engine and will need routine maintenance and repair. If you already have a reliable truck to pull a TT, then that may be a better option. Still maintenance required, but normally nothing that will handicap you that you can not use it or move it. Tt's generally offer more room inside as well.

You just need to decide what you can handle and what fits your camping style. We had a TT for a few years. We bought it brand new in 2010 as well as a brand new f250 to pull it in 2010. Earlier this year, we traded the TT in on our class c (in signature below) and traded the truck in on a brand new SUV. I'm not the best of mechanics. We prefer to buy new. We also take out extended warranties for peace of mind. Not only only for us, but I also feel better that if something were to happen to me, my wife would be able to have it taken care of and not have to worry about it. I don't expect her to end her way of life if mine ends.

I have yet to meet the CG owner/operator that can tell the year of every make and model of RV by looking at it. They have two valid concerns.
Is this old beater going to make my CG its final resting place? Will they just remove the license plates and drive off in the Toad or Tow Vehicle, never to return?
Does it look so bad that folks on forums like this one will talk about the "wrecks" at my CG?
So,
When you stop at the office and they have a "10 year rule", lie. If they look out the window (that's why they have them) and you get caught, they don't take away your next birthday. You just don't get to stay. Move on down the road.
And if you have an Airstream, you're golden. They haven't changed their looks in 40 years. They're classics.
One exception: If you're looking to make a reservation for a week to ten days over the phone, tell the truth. If they won't take you, call another CG.