We stayed here last year www.bosworthwatertrust.co.uk/ Very close to Leicester. Not sure how long from Gloucester. It was fantastic. Playground and loads to do if the weather is ok. And not expensive. Only problem is I'm not sure there was much to do if the weather is bad.
Essential Criteria: EHU Showers Will allow folding camper & tent side by side 90 mins (2h max if otherwise perfect!) from Glouc & Leic
Desirable: Not too expensive (can only go for 2 nights but will prob have to pay for 3) Playground Something to do for kids in bad weather
Have looked at loads but can't seem to find any. Think we'll need a biggish site as smaller places have had their EHU booked already. We can do without it normally, but this is the first run for the folding camper so need to test the electrics.