I've read of people successfully dying trailer tent and folding camper inners, using Dylon fabric dye pods (use in a washing machine) but it depends on what your inners are made of. Dylan is for cotton, linen & viscose. It states that mixes with synthetics will dye to lighter shades (pure synthetics will not dye).
What tent do you have? Most synthetic tents now have synthetic inners.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets