Depends what your tent is made of. I have canvas tents now which require little more than a stiff brush if muddy or covered in bird poo.
My son has a Vango Juno which after one camping trip looked like he'd walked on the inside of the walls right up to the top of the pole. We advised him to brush off the dirt and wash with plain water. As for inners if they are dirty I don't see why a spin in the machine wouldn't be ok dependent on material and water temp of course just make sure all soap residue is removed with an extra spin.
Not had to clean the tent or inner other than a brush down but we put sleeping bags in the washing machine on the duvet cycle. Not sure its recommended but we have a young lad who is a bed wetter and the sleeping bags seem to do ok in the washing machine! He has had 2 mummy style sleeping bags (we always take 2 for him) from Halfords for the last 3 years and they get washed a lot in the washing machine and don't seem any the worse for it.
------------- 2015 April: Polstead, Suffolk. May: Two Acres, Ely. Waveney River Centre and Whitehall Farm, Norfolk. Aug: Howstean Gorge / The Quiet Site / Fron Farm / Cae Du / Trevayne Farm - BOOKED!
Sleeping bags usually come with washing instructions depending on what they're made of. I'd happily wash a cotton faced sleeping bag in the machine but I haven't yet dared to give my DS's lightweight technical fabric sleeping bag more than a good airing between uses. It's best to air out sleeping bags completely when you return home, before storing them. If possible store them out of the bag, hung up, or loosely folded. If you store them in the stuffsack they may lose their loft, and if you store them damp they'll grow mould.
Most canvas outers, no matter what fabric they're made of, should be cleaned wit nothing more than a sponge and plain water. you can use a soft brush on a canvas tent to remove mud etc, it's best to stick with the sponge on synthetic fabric.
If an inner gets dirty and your washing machine is big enough give it a wash on a cold rinse cycle only, no detergent. if you have to use detergent because of some vile stain then use non bio and give the item a second rinse to gewt any residues of detergent out.
Just remember there's been more tents and camping equipment ruined by over-enthusiastic cleaning than by leaving well alone! So don't stress over small marks and keep cleaning to a necessary minimum.
Water and cloth just to wipe of bird poo etc, take a dust pan and brush so sweep out on camp. Often hang up at work to air fully
Ground sheets and pegs get the water and cloth treatment as well
Sleeping bags get aired on the line afterwards and stored out of the bags as do sim and Airbeds.
My bag is down so has fairly specific washing instructions usually do at launderette as needs drying in large drier to ensure keeps it's loft. This is only every couple of years - don't camp enough to do more often.
------------- The futures bright the futures ginger.