Mine is a 102 and it’s fine with the weight of a full conversion. Even with two of us, a dog and luggage.102 is low on engine power for a heavy rear conversion, but not totally useless.
The 102 comes with the 5speed box, which is not the best, versus the 6 speed box.
75k is low miles for the age so that's good.
Standard mechanical things that need doing you will have had done.(Most)
Ie
Cam belt and water pump.
EGR
DMF.... Not mentioned above.
So if you're a standard conversion, doing standard camping and not touring Europe for the next 5 years you should be good.
Post some pics of your van and document your journey.
When there are four or five of us and luggage it struggles on long or very steep hills a bit but most the traffic around us does too.
I like the 102 and won’t rush to change it, especially now the kids are of the age we don’t always take them. If I win the lottery I’d only go to a 150. The 204 would leave me fretting as I also overthink.