In case it helps others' planning, here's our travel and accommodation expenditure (2 of us travelling together from/back to Poole, sharing hotel rooms).
Clearly prices will be 'different' and LWaB (next door cabane in 2019) has pointed out Huttopia rates seem to have increased significantly (supply and demand, I guess; >25% like for like, it seems to me).
We drove to Poole, took the ferry to Cherbourg on Friday, rode to Valognes (an hour), train to Evreux and overnight there, rode on to a wet Rambouillet Sat am (?120km), registered, Huttopia Sat-Fri (6 days), with two 'lodgers'.
Paid £876 for 4 bed (?6 pers) Huttopia Cabane (tight double bed room downstairs, twin bed room upstairs and a pullout sofa bed either upstairs or down; adequate kitchen; good shower with loo, porch to keep rain off bikes, plastic ones indoors overnight).
I recouped 2 x £209 from G & G (= £418).
Rode 1200km: Sunday evening start; finished Wed late/Thu breakfast respectively.
Departed Friday and rode back to Evreux (99km, LH STI failed about half way); hotel overnight and train am to Cherbourg and ferry (Saturday).
- Brittany Ferries (Outward & Return Crossings) £208
- SNCF (train from Valognes to Evreux) £64
- Comfort Hotel (Evreux) £42
[Ride to and from Evreux to Rambouillet]
- Evreux to Caen train tickets (on the way back) £42
- IBIS Budget Hotel (Caen) £47
- SNCF (Train from Caen to Cherbourg) £26
The social (randonneur) milieu and restaurant at Huttopia were first class (pizzas and beers mainly). Some basics from tiny campsite shop but town centre/shops (and railway station) are only a short ride away.